Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a6c2ae6b22f3f43…

MALICIOUS

PDF

88.0 KB Created: 2021-08-04 10:59:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: dc2c16a674440b9c2b133478bde78196 SHA-1: 29db1b6372dc522bbee343dddbf562f27d1317a5 SHA-256: 0a6c2ae6b22f3f43f74d2bb76e95ed8abcbe978bb2b31fe60d6f14aa48c5cf5a
204 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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 https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/973e75a216f7b09afe1511b35dcd4d65/72310014849.pdf In PDF document text
    • http://isagenixmakessense.com/ckfinder/userfiles/files/63169763140.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/58921163817.pdfIn PDF document text
    • http://johnlillylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zeloniruxivize.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/pupesezijuzozitutegal.pdfIn PDF document text
    • http://orchid-daikanyama.com/userfiles/file/nuvixarevovavoranika.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/nenopefojovevesu.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/9f4ed0646e805c96354fb1371066f160/40267058209.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/jason.pdfIn PDF document text
    • http://www.lnk-creation.fr/upload/file/gidero.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f567a3806---10000846464.pdfIn PDF document text
    • http://chicohigh1987.com/clients/47015/File/92244565993.pdfIn PDF document text
    • http://altadirezione-consulting.it/userfiles/files/nabutizesafisowewig.pdfIn PDF document text
    • https://xn--80aaa1arbfjoe3bzh.xn--p1ai/data/files/lajijopugu.pdfIn PDF document text
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/gkdjsqooc839op0vfpm2s9l45e/18144184808.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607338e52c0fc---fetifosuwatewaboti.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/nojuputevetimemoxagasu.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ce27ce7a974---gakabefapomomum.pdfIn PDF document text
    • http://cga82.com/admin/File/judanipamutiruranira.pdfIn PDF document text
    • http://smflow.in/admin/uploads/file/93187671613.pdfIn PDF document text
    • http://kleinschadenexperte.de/userfiles/file/toxefakasoz.pdfIn PDF document text
    • http://www.tomasjelinek.com/img/pub/file/84202778517.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/21186740012.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=nck+dongle+qualcomm+crack+2019PDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f06d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10884 11132 bytes
SHA-256: ce00bbea1db9c7a1e83921682a4e0ab8615dbde68dfa85dd291864b43a7744db
font_02_sfnt_off00012215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12215 18040 bytes
SHA-256: 6571b60aac675c9118028cc7c62abecd3835c8a9e1dd6416ed0aecafbac3d5d1

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