Malicious PDF — malware analysis report

Static analysis result for SHA-256 aee63f669464838e…

MALICIOUS

PDF

38.2 KB Created: 2021-06-15 21:37:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 85f4ef814c6d22e8e9304eac7a70d528 SHA-1: 23cf78fec0c6c9afb0e88331cad4fb90f1fd8799 SHA-256: aee63f669464838e5672349227df6b39e42f07f66e1513d13166cee7fe666916
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier. It functions as a link farm, directing users to various URLs hosted on compromised websites, likely for phishing or malware distribution. The presence of an 'Image-only document with action trigger' heuristic suggests it uses a screenshot lure to trick users into clicking the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6430

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 38 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://crewmak.ru/uplcv?utm_term=7tox+for+final+cut+pro+serial+number PDF link annotation
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/7e4653d0aaf0e1c4d6809a36c87d4322/xijogajalojizi.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/4ebde2f431d1b7376e13c1657fcc125c/47527772859.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/dfc46338593c106b32aa98048d2442ff/64899265635.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160810bbf5599c---gijeduxok.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/dd25e33d091e3bd4d1ca2e56365a56e0/kimuve.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/81211803862.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/rawofojaxuxevoxakesabemoz.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/f5f63e6fd4dee39fa8cb61fc70cf11fb/99367416196.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d756479f1---21662750852.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b259a2f2942---kimewo.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/zenosegegalotuvabo.pdfIn PDF document text

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