Malicious PDF — malware analysis report

Static analysis result for SHA-256 60b4256979e64e40…

MALICIOUS

PDF

63.7 KB Created: 2021-06-19 10:20:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 96ba3877cf978b581b94ede1245d5e3d SHA-1: bf1d74e7af47d2bb347460a971ba6d39e9be5bde SHA-256: 60b4256979e64e4097f3bc6974f3bdc14b4e57c6c5024f9843b3a99834a49a23
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains references to URLs and potentially embedded scripts that likely facilitate the download and execution of further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8996

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://crewmak.ru/uplcv?utm_term=fur+elise+piano+letters+both+hands PDF link annotation
    • http://aliglobshop.com/userfiles/file/87744138256.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc36e5ca8c---718227699.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16084fb5233ec4---wijazilegogoti.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/6e4f81251b60e391e9a4864239346117/xavosufujovodotutexare.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9d1dac899---3786869578.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/wesekokebiliv.pdfIn PDF document text
    • http://aardbeienfeesten.nl/uploadimages/files/39390264917.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/pizulanipawarenoso.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/i7ts1n68f0s97ouees2rh58pr2/jafupiverasowipajuzew.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/34488018023.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f79e509c4---50789492100.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/6b5e0c09fe44ccdc7d460664184bb513/20208277844.pdfIn PDF document text
    • http://dongkoo.com/uploads/editor/files/30631377970.pdfIn PDF document text
    • http://sns.hu/_user/file/68205589504.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c54f992a9b5---kisod.pdfIn PDF document text
    • https://immo-macedo.lu/userfiles/files/74293353872.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC571 5024 bytes
SHA-256: 8f6c161fdb7d7f211a839926565d2041eb5c4b3d7f485667098a87dd29b7bc11
font_01_sfnt_off0000d661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD661 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000deee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEEE 11292 bytes
SHA-256: 3b010e719c8cf89863cca01f4adf8260fa04497f4ec26c127e4cafb0402b5c41

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