Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6e97077094ae2b6…

MALICIOUS

PDF

67.9 KB Created: 2021-09-01 18:20:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f4b8dc234ffc200c3d605461f2334a48 SHA-1: 3ff9fc6b0b4ea6ef9b184d77f9160f07f3029eea SHA-256: e6e97077094ae2b664ae0d21e1c31e017594ea18fdf83425da6421bef413def8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and links to websites, some of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure suggests a link farm designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8329

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://philabc.ru/uplcv?utm_term=philosophy+and+phenomenological+research PDF link annotation
    • http://kerekagy.hu/UserFiles/file/36568581074.pdfIn PDF document text
    • https://xn--p3t29jo1ed4o4xw.tw/upload/files/modiwizagufavemugopasaj.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa615501f6---jarabozeninepin.pdfIn PDF document text
    • http://vning.net/filespath/files/20210818151749.pdfIn PDF document text
    • http://puppiesulove.com/clients/7/7f/7fa6d7836ea929643a3c23f4562b158d/File/88901845595.pdfIn PDF document text
    • https://alzubidi.com/userfiles/files/pogulupekukame.pdfIn PDF document text
    • http://happy-travel089.com/CKEdit/upload/files/tafumavelexitubigulorebik.pdfIn PDF document text
    • http://rurisnet.org/images/file/gubusetipogatuzamusiz.pdfIn PDF document text
    • http://sntaviator.ru/ckfinder/userfiles/files/13100674248.pdfIn PDF document text
    • https://at-studio.tw/app/webroot/userfiles/files/20210630_091846.pdfIn PDF document text
    • http://studiogeologicotrilobite.com/userfiles/files/favonojapemuxirurejizuz.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/109e7d45a4e792057b0b9325d0038ae9/58012425651.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/k0sgkn68dkiq3hh4mosgda5le4/75717451131.pdfIn PDF document text
    • http://dokumsuzgec.com/userfiles/files/bapavilaf.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/suIn PDF document text

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