Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd980342abc94b9e…

MALICIOUS

PDF

91.0 KB Created: 2021-08-08 13:50:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9d9eb82777288c8c43c116051a64cbd0 SHA-1: eb85f6f595cb7581342d62460b7812481f447e5d SHA-256: bd980342abc94b9ecc58ff669b4d72167336a07d4a8923e0836f27e466bba872
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a link farm pointing to compromised WordPress sites, suggesting it's used to distribute further malicious content. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to trick users into downloading a payload, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f5814634457---87136018838.pdf In PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/154a8b13f53756d3929a79099d84080d/zegudu.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c92e007875b---93738892844.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/52567774991.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/d3401d6ea3c16ffe864b87f1025bd49d/wexegotuvexul.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/6c4p92ho2f9uvcsfhcsloa8o63/79438182171.pdfIn PDF document text
    • http://snbedu.com/uploadfile/file///2021072607012380.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/92757680200.pdfIn PDF document text
    • http://weingut-suppan.at/files/98984295398.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/57805916089.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/adc8683a59889898cae40ccd34039b75/92459636574.pdfIn PDF document text
    • http://misterholidaysanprisco.it/userfiles/files/koxivabarezogagis.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/xagusurojasagepop.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d21bf38f32---90292048608.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/bubkeian076ln3usmkrper9mci/73368027.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/qje2g943v9siqtq5p0luf5nou9/65529180575.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/t68hus5gg5jcdbt18bencidols/22209478692.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/sivigubidetesaparadog.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5d27d968f---89595922186.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/3m2uhlcdcdmu471maec7i7un5m/20685368590.pdfIn PDF document text
    • http://dzwigipoznan.pl/userfiles/file/69760289551.pdfIn PDF document text
    • http://www.moyekolodin.com/files/98017286039.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=class+11+biology+ncert+textbook+pdfPDF 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_off0000f94d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94D 18036 bytes
SHA-256: b3b9e8cfbff900c94dcb90a5c06847ca92529b0188a45044bf39bf39b5646619
font_01_sfnt_off000128d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D5 11328 bytes
SHA-256: aefa9ab0b1da5f92ba1dac76065a12c591f7b1969eef02ac5b91b6064756112e
font_02_sfnt_off00014354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14354 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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