Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ab265327f319b2b…

MALICIOUS

PDF

74.8 KB Created: 2021-08-22 03:18:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 02ffe2d790cc007558939bb01fba6411 SHA-1: 6232fb9d4a5b7009700a88425f6ea16a5a5e9779 SHA-256: 9ab265327f319b2b2a7287c3a8f6c72636a155f8fd6984c4d62385e0a79e21b1
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and embedded URLs point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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
  • 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 http://jmdfhjl.com/fckeditor/userimages/file/wiwijapazasogobugonogogoj.pdf In PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/9s76v0t8of8uupn61j6stbieu4/konaveveworabezabetagig.pdfIn PDF document text
    • http://flynewsletter.com/uploads/file/67178670574.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/bulatogodoxinimiz.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb614d3a37---nasawuwefirov.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/auhabqqkc6oijp81jm6emm3ncs/tewuxuwenipo.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/f1244a3f5c25bd95de688c614ce37535/xoxuraduwaturudutegufov.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16090eeb292109---xomoxasegigovexezeda.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/82979677542.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/6720b1dde197d19787fdff820c5037e1/444347732.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/kukilugepekolutifewopuve.pdfIn PDF document text
    • http://imhkayseri.com/resimler/files/dosisotizukeb.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/70a539a0b321198ae423aa3b30065781/munazebowabirebalirogesi.pdfIn PDF document text
    • https://reniuved.it/file/janotexobigezaxapim.pdfIn PDF document text
    • http://goldmustang.com/files/files/15923628794.pdfIn PDF document text
    • https://carmelocuritiba.com.br/ckfinder/userfiles/files/41576524567.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/6ac6462af47b3526f6eec0e848dd610d/56777076623.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703008efe54---zejirar.pdfIn PDF document text
    • https://10playsolutions.com/clients/softklk/documents/_articles_/file/xilekijirefufujawo.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/d4f9361281902d97f3a8487828fd813b/bebedokinirufupif.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/33uo9u47qm68p865n8boeprke6/ponutukokedolarox.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/pifugizurotegizizinov.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/4a71e45gj9su3j492eruh89u8k/zaxofetiketukerekuje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=como+hacer+un+proyecto+de+investigacion+cualitativa+pdfPDF link annotation
    • 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_off0000bf79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF79 16396 bytes
SHA-256: f6630386f928066d483fd9eafb05e30c1db6c01296e947ed4a5a512d5f57e052
font_01_sfnt_off0000e8b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000100c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C7 11380 bytes
SHA-256: 562918aec4dba7a177fb3969073fbf52e963f78af0b4a968e3a6375f337d8bac

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