Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb9e959a73b159fe…

MALICIOUS

PDF

92.9 KB Created: 2021-07-24 06:31:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 63ea1c7b710f3db75c5deaeae5b8702f SHA-1: 5e013a50e85510a94ab6f4cd93f7989d13ed1c89 SHA-256: bb9e959a73b159fe4e6b7eaaeb1262d759679f7062af0f168130c4bdc24ac438
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external resources, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users. The presence of a 'download button' lure and instructions for a password-protected archive indicate a phishing or credential harvesting attempt, likely to trick users into downloading a malicious payload disguised as a compressed file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9523

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://fornacedelia.it/userfiles/files/58771409229.pdf In PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/muliri.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/a7f9e76823f280bc213233c37ff64585/minegazesulawefivimagorex.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/fa721899f2cdac1b911b9ce1176d9988/gapopuparator.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9cfe1f2569---leloxegonabowido.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/33301433316.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ce8fad639---73583841440.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160df9324a996e---zepofekusabuwozunajebu.pdfIn PDF document text
    • http://walkofagesvt.org/clients/0/0e/0e42319052772b195a43ba3ede0f03e0/File/fiwarubafamoki.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/cgahrasit5ko571acalfm3cgno/kupufawibopavu.pdfIn PDF document text
    • https://avgdesign.com/userfiles/file/27794964820.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/de83ef6cdb0f35c20226c42440ec0d8b/39034454753.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/462b995c7633ba9a370784d6ac49dfa3/vanopajoximagugesimiraduf.pdfIn PDF document text
    • http://ibconsulting.it/userfiles/files/kiwepexekuwisides.pdfIn PDF document text
    • http://keralabiblesociety.com/fck_uploads/file/58329648041.pdfIn PDF document text
    • https://cometsecurity.in/admin/userfiles/file/nabalomemawukolotewa.pdfIn PDF document text
    • http://k-yoga.org/file_upload/spaw_upload/file/20210601235135.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c398e721d16---rofage.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078eab0ecedc---72587611174.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c657a6ceb60---1219665269.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7f48135069---87119150714.pdfIn PDF document text
    • http://ithaca1966.com/clients/8/85/85e9e0a76fddb83d7689cebc6ab07fae/File/38752745559.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a47b919b35---narenavow.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f089166059---kivewubagikipa.pdfIn PDF document text
    • https://kamedia.vn/data/file/kadajowani.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/68310233082.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cca1ef1ea1---kopararajasap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=naruto+shippuden+ultimate+ninja+impact+ppsspp+highly+compressed+200mbPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFFA 16144 bytes
SHA-256: fcca37035df06e555c2991ff65faa0e8497ca6423bee408ebc46b3aef925b516
font_01_sfnt_off0000f575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF575 17468 bytes
SHA-256: 4167208b3b86d019a14804dd85f51ad55f5cb200d1471595f553978858211601
font_02_sfnt_off00012317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12317 2756 bytes
SHA-256: 2c73911ea589b6f9cba1eb89a8104f8ff998478efffcbed24528735253a9ae14
font_03_sfnt_off00012ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF0 11664 bytes
SHA-256: bcda98c1f9fb393260decc1c26660890e7c5f1a7b6bd30e4d22c3610492a9248
font_04_sfnt_off00014a2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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