Malicious PDF — malware analysis report

Static analysis result for SHA-256 36c2c9bbe2ee2764…

MALICIOUS

PDF

39.3 KB Created: 2021-07-13 13:23:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4de10771e34a5c50d611892ffe3c87a2 SHA-1: 5cf8f7adf7df817b1654acd102088ca4797b6baf SHA-256: 36c2c9bbe2ee27641c01a043be9dd690242cedca4d8450238190b8d9d929ca32
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. The heuristics indicate it's an image-based lure with clickable links, likely intended to redirect users to malicious sites. The presence of numerous external URIs, many pointing to compromised CMS uploads or disposable hosting, reinforces the phishing and malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8579

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 39 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://archism.ru/uplcv?utm_term=the+law+of+human+nature+pdf+download PDF link annotation
    • http://chapelguild.com/images/usr/35701834974.pdfIn PDF document text
    • https://olympicwroclaw.pl/zdjecia/fck/file/77124575767.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/boxiweg.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abd3d371e5a---8007248143.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/fa32g5c9crnj2et9f4e2bc3fj1/60899601047.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/0ac25605f794e3e41c89a46c954c56ff/13762638429.pdfIn PDF document text
    • https://deitratech.com/userfiles/file/pisetisaxojovuxoteziletax.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/arb54naq7npsv1g4a6pla3o7ub/616981817.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c22a5ada173---25624471941.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/44468cb0c95c3ff3a5ccd06c22870e8a/79299844488.pdfIn PDF document text
    • http://aplus.to/userfiles/file/duripavejinasetasod.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/ec05bc8bc4086a4045d3f973da7b117f/58031448029.pdfIn PDF document text
    • https://condominiobrisasdelnorte.com/userfiles/file/76971244407.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160707d6091116---mebegoxovadoki.pdfIn PDF document text
    • http://e1pl2.nazwa.pl/busy/fotki/file/70455694431.pdfIn PDF document text

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