Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2c151da058408ee…

MALICIOUS

PDF

82.4 KB Created: 2021-09-24 12:14:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3c2c193eaed6c520bcde216db6943072 SHA-1: 76d18694144210f2e01bbfba98543b121a7c9946 SHA-256: f2c151da058408eed828a2d8d31d5bd150ec23e3d88a0575244cc0e9afc91530
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains numerous embedded URLs pointing to disposable hosting, characteristic of a link farm used for phishing or malware distribution. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically identifies this pattern, suggesting the document's primary purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://garglob.ru/uplcv?utm_term=4+levels+of+rainforest PDF link annotation
    • http://cesurmakina.com/userfiles/file/90903205599.pdfIn PDF document text
    • http://wohntraumgmbh.at/makugelapivupigew.pdfIn PDF document text
    • http://huanghels.com/filespath/files/20210903213311.pdfIn PDF document text
    • https://oasis-travel.ro/files/pujaz.pdfIn PDF document text
    • https://www.caissedesecolesdu5eme.fr/backoffice/ckfinder/userfiles/files/63165826484.pdfIn PDF document text
    • http://notar-frings.de/userfiles/file/54829177440.pdfIn PDF document text
    • http://zgkimsteszew.pl/img/upload/files/3482974844.pdfIn PDF document text
    • http://daejonggyoyc.com/userfiles/file/20210921152714.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/16148426799.pdfIn PDF document text
    • http://travelci.ru/ckfinder/userfiles/files/39593579206.pdfIn PDF document text
    • https://puntodeplacer.com/userfiles/file/79253369563.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141e0f532581---56121811126.pdfIn PDF document text
    • http://autofox.lt/ckfinder/userfiles/files/47174303555.pdfIn PDF document text
    • https://www.burnat-provins.ch/ck/ckfinder/userfiles/files/saxiginilabux.pdfIn PDF document text
    • http://magischtheater.nl/userfiles/file/78253537284.pdfIn PDF document text
    • http://zimmerei-possert.at/nefobonavorizufix.pdfIn PDF document text
    • https://zagi.hr/files/xivinufelijajedod.pdfIn PDF document text
    • http://kingalbertltd.com/uploadedfiles/file/64207922272.pdfIn PDF document text
    • http://adamslakeband.org/userfiles/file/50280200465.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f431a24dda---nelosulo.pdfIn PDF document text
    • http://studiofranzoni.eu/userfiles/files/85494886581.pdfIn PDF document text
    • http://moda-minulosti.cz/docs/momin/file/68335651976.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E6 16844 bytes
SHA-256: 16f0950055de7436bc9f93d0e326fc258280a351a4d9c2aa8fe7f320b9b84fc3
font_01_sfnt_off00010c80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C80 10256 bytes
SHA-256: bba7fbf142e8b41351fc07eb7feaca8ad79fe97818571e581d0070f8e22a20ed
font_02_sfnt_off000123ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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