Malicious PDF — malware analysis report

Static analysis result for SHA-256 484ed5aaa36f3707…

MALICIOUS

PDF

37.6 KB Created: 2021-09-16 16:08:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f029c30805683c814fab9a10a3e4789f SHA-1: c4489c490f2bf0d1eceea2b90568422787bff018 SHA-256: 484ed5aaa36f37079d5b4d5792319f4bf640121fa7788e0b1f19df3a7f181605
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, typical for phishing campaigns, containing multiple external URIs. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit users via a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7773

Heuristics 5

  • 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 37 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://garglob.ru/uplcv?utm_term=blank+copy+and+paste PDF link annotation
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/7a02a0296818362aed42ef3bfeeeef42/mosujodaji.pdfIn PDF document text
    • https://cezartravel.hu/userfiles/file/64228415876.pdfIn PDF document text
    • http://dlabiura.kbo.pl/ckfinder/userfiles/files/bilod.pdfIn PDF document text
    • https://nutrishop.in/ci/userfiles/files/91127590179.pdfIn PDF document text
    • https://rm-parketi.si/uploads/21962124298.pdfIn PDF document text
    • https://fishboat.hr/files/70517494612.pdfIn PDF document text
    • https://impactmediaresources.com/userfiles/file/63552890251.pdfIn PDF document text
    • https://francoisdaulte.com/ckfinder/userfiles/files/23496818638.pdfIn PDF document text
    • http://www.atsamuihaus.com/image/upload/File/84171430538.pdfIn PDF document text
    • http://soeurs-scjboran.fr/soeurs/upload/files/79904952920.pdfIn PDF document text

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