Malicious PDF — malware analysis report

Static analysis result for SHA-256 21eab36f94d7aa44…

MALICIOUS

PDF

51.2 KB Created: 2021-05-29 06:20:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 442ea3f5c88bccb0ddc1e87395b0e590 SHA-1: f5dcad581b532b5c925a3bf04c8e4fe5e7814c0d SHA-256: 21eab36f94d7aa447768f06b1a8b2fc9533a8089bf04774ef7933a9ae9294e41
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a link farm pointing to compromised WordPress sites, likely serving as a lure for users to download further malicious content. The document body, though heavily obfuscated, suggests a lure related to game hacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9443

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 http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160923641cb8f4---zevajejofopotonokum.pdf In PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/uoevpnvi4scq3sq2hqise0upf4/rudigozowenabitikoxawitib.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/4cc9a784dee110244180478f28f5ea14/jaritawopulugebipijek.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/b898f1d10c3401ba7c84ca676d83b401/tipubipuvapesadawinu.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f56266802e---kogunibojebagapajepota.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/5ddc90239051dc54e8be9105584fe3d1/82392791339.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/kifapupozukupezasekavuma.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16077f790e18f3---rivasudalamatov.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/7et117e0h7cnjirkjclnpi0u6t/mugugubibupixinelegor.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/zametexebopatifijar.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080651a6827c---35845857507.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/97359a5e1eaf6a1af432054e46b7b30e/befijanaxusumigaxazox.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/4a3cdd914699b3731f71641d6ca1902e/59266839727.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/45643422a19af8f9cee8fe6a0af7c82c/kebajoboxulepajubusu.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/dodugokanodiwotubi.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160793d0778b78---xorudeganorafodij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=respawnables+hack+apk+7.2.0PDF link annotation

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