Malicious PDF — malware analysis report

Static analysis result for SHA-256 68c8c8109e4d4503…

MALICIOUS

PDF

38.7 KB Created: 2021-10-01 10:30:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 3d9dd91c882a05185f9c383e8d066443 SHA-1: 9351a965de9766b946769af393bb7ea2551d8dfc SHA-256: 68c8c8109e4d45037e0ec2b107ecaaafc85f336e901f61e5059cb2cffc72d20a
144 Risk Score

Malware Insights

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

The PDF is identified as an image-only lure, typical of phishing campaigns, with multiple embedded links pointing to potentially malicious content. ClamAV and ML classifiers confirm its malicious nature, indicating it's designed to trick users into clicking external URLs. The document body is heavily obfuscated and contains no readable text, reinforcing the interpretation of a visual lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8495

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 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.
  • 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://chirineli.com/img/lib/file/93891685200.pdf In PDF document text
    • http://gddfboiler.com/uploads/files/wilubitamud.pdfIn PDF document text
    • https://aonetreks.com/uploads/file/28421525464.pdfIn PDF document text
    • http://vita24h.com/uploads/userfiles/file/33302998625.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/21803194255.pdfIn PDF document text
    • https://foodvellythailand.com/upload/files/zirotazobisuxakudabul.pdfIn PDF document text
    • http://purofirstli.com/userfiles/files/niretadutezupinakagibeso.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/3jt3p1nj3uqqbga6e20bpi6e8h/buzefarijujomoludif.pdfIn PDF document text
    • http://sfalojistik.com/userfiles/file/31379144472.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16145744f50dd7---lukuvomozekutozupav.pdfIn PDF document text
    • http://104450wp19.agentcentrum.com/userfiles/files/joxujononegasi.pdfIn PDF document text
    • http://chinazzjx.com/d/files/jibuxumagojowozimelu.pdfIn PDF document text
    • https://ohcsi.com/ckfinder/userfiles/files/voniviv.pdfIn PDF document text
    • https://loyallcanada.com/editor_files/file/sadigored.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=ebony+bbw+granny+pornPDF link annotation

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