Malicious PDF — malware analysis report

Static analysis result for SHA-256 c54975408bbd5c61…

MALICIOUS

PDF

47.8 KB Created: 2021-05-27 20:46:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b6a1b9e6a353efa45866791bf7ec8f6 SHA-1: c664fb0a384dbd5ae2d66fc100e0332861203c54 SHA-256: c54975408bbd5c61eb15fcfa9f1fc9dfb1924f41d97800fe671b8c2dc73c1a47
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing lure. It contains numerous links pointing to external websites, many of which appear to be hosted on compromised CMS platforms or disposable domains, suggesting an attempt to redirect users to malicious content or download further payloads. The document's structure as an image-only PDF with action triggers further supports its use as a deceptive lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7193

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 47 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://coretry.ru/uplcv?utm_term=stickman+warriors+super+dragon+shadow+fight+codes
    • https://aonetreks.com/uploads/file/742048402.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cba1e8f4d2---nadeveravosarobupineme.pdf
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16077fe879d493---77120784083.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160978f2f523fa---dosokerepafiwom.pdf
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c2360dc91---xemukoneweli.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/723p99hrq0b4ff2t79ph8svubq/tarosovopeseso.pdf
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/70db9588d808e729d7a5d39165121e1a/gesiletopewo.pdf
    • https://bandotrading.com/uploads/file/lekidipugukemededin.pdf
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2bd023d88---wovabejaxepi.pdf
    • https://sinhadventure.com/uploads/file/57094960889.pdf
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/49a822d909fad041b57a4ebab541fbd3/84474678921.pdf
    • http://ankaser.com/userfiles/file/xafal.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdbc86ec9e---34099484234.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/3e8000f8f524678955cd65d4d13d2afb/82814099889.pdf
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/kr76lukdf4ei51vslmussldu9f/29680365639.pdf

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