Malicious PDF — malware analysis report

Static analysis result for SHA-256 a16c27964428ee28…

MALICIOUS

PDF

37.3 KB Created: 2021-09-05 09:08:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f4671300be50ff89bef938f1aa54c159 SHA-1: d11ddcc66c4a1fecff3955444748c696441210cc SHA-256: a16c27964428ee282282aa85134e2f0099ad2bf1af53f70dbe7feb404c313563
144 Risk Score

Malware Insights

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

The PDF is identified as a phishing lure due to its image-heavy nature and embedded clickable links, a common tactic to redirect users to malicious sites. The ClamAV detection and ML classifier further support its malicious classification. The document body is heavily obfuscated and does not provide direct textual clues, but the overall structure and heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7998

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
  • 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 http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/44471824396.pdf In PDF document text
    • http://spy-military-labs.com/userfiles/file/56543636263.pdfIn PDF document text
    • https://hv2barrier.com/application/third_party/ckfinder/userfiles/files/40579221652.pdfIn PDF document text
    • https://srccaa.bdbabymart.com/app/webroot/ckfinder/userfiles/files/64849633127.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160924a59bae91---bowub.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/beluletavakonug.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/bd66ae00861a2e1938e090bda113f5a2/fabarikekegezemik.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/tikubepodogoxesigaxito.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=leader+summaries+pdfPDF link annotation

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