Malicious PDF — malware analysis report

Static analysis result for SHA-256 20042065bfca4ede…

MALICIOUS

PDF

39.0 KB Created: 2021-09-24 22:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 87482d836b16bcd2634afbde923ffae9 SHA-1: 9f1744bcc1879a91e25e87cf6bacab7bd3e243da SHA-256: 20042065bfca4ede39f362a627405eef27fca8f16564946b32a90df0d54728c6
152 Risk Score

Malware Insights

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

This PDF document employs a common phishing lure, presenting itself as an image to entice user interaction. It contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect the user to malicious websites for credential harvesting or further payload delivery. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8588

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 39 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=motivational+h+words PDF link annotation
    • http://hyunsin.net/userfiles/file/batetaz.pdfIn PDF document text
    • https://plentis.eu/ckfinder/userfiles/files/9630772030.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/livotekijuzutanazipufi.pdfIn PDF document text
    • http://er-trans.com/img/produkty/files/jirediwure.pdfIn PDF document text
    • http://kbautotech.com/board/datafiles/imagefile/gesuvuviragisimet.pdfIn PDF document text
    • https://namdolove.com/FileData/ckfinder/files/20210902_950BA765EF78F67A.pdfIn PDF document text
    • https://sadhankendra.org/erc/media/71970859152.pdfIn PDF document text
    • http://zensushialiso.com/uploads/files/50463316883.pdfIn PDF document text
    • https://agros.net/uploads/file/rifiremumajadokanodozose.pdfIn PDF document text
    • https://ataru.site/js/ckfinder/userfiles/files/95718697915.pdfIn PDF document text
    • http://carzip.biz/files/uploads/files/87221902501.pdfIn PDF document text
    • http://gospelpour100voix.com/fichiers/newsletter/file/logorapigurevakugo.pdfIn PDF document text
    • http://inbond-cn.com/userfiles/file/26584880004.pdfIn PDF document text
    • http://keralatravelpath.com/uploads/file/59422693473.pdfIn PDF document text
    • http://greece-ex.com/images/blog/file/12248548290.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/82261304002.pdfIn PDF document text

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