Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e2b13b70c3cb02d…

MALICIOUS

PDF

66.4 KB Created: 2021-08-20 06:00:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 806f19339ac51caafab4de8989a9a932 SHA-1: 919252aa59726662572433995f01a739016bde50 SHA-256: 3e2b13b70c3cb02d52abb5beef06135ea8418826871ced77f5e26ed2a32443a2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and the nature of the URLs indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9363

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
  • 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://synerhu.ru/uplcv?utm_term=test+gest%C3%A1ltico+visomotor+de+bender+ficha+tecnica PDF link annotation
    • http://aldobini.it/userfiles/files/mixidugudufulefe.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/jsi0tta3bi7buunfqq0aai4591/tajazawapifewigi.pdfIn PDF document text
    • https://alstar.uz/images/shared/file/fepomefuzufisunidojatabu.pdfIn PDF document text
    • https://mimpiindah168.com/contents/files/34243106962.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eca6df5fdac---36265008186.pdfIn PDF document text
    • https://krono-original.vn/Images_upload/files/mawogujegujovuguwajonu.pdfIn PDF document text
    • http://saopauloairporttransfers.com/ckfinder/userfiles/files/jetumib.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/m7cp3havcf2kn67v6lhf81ruob/89642900014.pdfIn PDF document text
    • http://mamnonkitty.com/webroot/img/posts/files/xevikun.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/boxogunufu.pdfIn PDF document text
    • https://floresdeserrezuela.co/aym_image/files/rabivafenan.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b7286a253c4---87716399904.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab06cc876c---51136549578.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089ccd368dd6---84326496839.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160926a91af592---padelugefonipilamona.pdfIn PDF document text

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