Malicious PDF — malware analysis report

Static analysis result for SHA-256 c40980688ce2d94c…

MALICIOUS

PDF

66.8 KB Created: 2021-06-10 15:44:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 0e6f1e3d06ae04a2008214b6d66bc14d SHA-1: f6bae51f06442fc771b020a9b309baf7371a9ecb SHA-256: c40980688ce2d94cb051daf15963571aa5faf8e457fa35cab91ed95b22e002fd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. It contains a link farm pointing to various compromised websites and disposable hosting, likely intended to distribute malware or facilitate phishing. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8438

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://drafthe.ru/uplcv?utm_term=gta+5+ppsspp+download+iso PDF link annotation
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf5c2c8bf95---73909878564.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/06d9aa451166e6eeb7eb789a53dfa704/vijulojanekem.pdfIn PDF document text
    • http://fobosgrunt.ru/files/ckfinder/files/3536075642.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/47fff4c226fb6ed4fdca2d10d8149c47/55016775531.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/ouh5nnve2tm6d435gq35dhjf75/kujeruladisex.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/0b8a6c32dfa3d2a641a41fc22cbf1ee9/sazurajegalobupipimadoza.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/22383927213.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1524cf68e---36578777817.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076354f614a5---611983727.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/222962e51a0eda877e862e9a57fe6a5f/manatinik.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/0fjm0tf8r16jhgn1go229fvpt7/remidatalaga.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160917cadb76a7---22645848129.pdfIn PDF document text
    • http://kingnature.ru/files/files/kowoz.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160780b587bf17---zolopubududurimigebano.pdfIn PDF document text
    • http://rudolphalexander.com/uploads/files/52083078663.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA84 4776 bytes
SHA-256: 7ec820e7df76b818e1e98dfaec36fa6f9dd162c70709b138958b2890b418e461
font_01_sfnt_off0000eae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE5 10708 bytes
SHA-256: 90909d18d1f76e4cea2d3bee9c1fa32b7ee36653b83158e52b4909b319c407a1

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