Malicious PDF — malware analysis report

Static analysis result for SHA-256 96c2a36f8ba9ff49…

MALICIOUS

PDF

83.3 KB Created: 2021-09-19 21:37:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d5f34a6b15b31e3902b523c2fb1b2ae7 SHA-1: 6ea6a00fce190fa6bffbe0f904671a3dafcbffb7 SHA-256: 96c2a36f8ba9ff4944fc6fc5d060ca8b2625bc6fd86af8c285bd35287fa099b2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for distributing further malware or phishing for credentials. No scripts were extracted, but the structure and embedded URIs are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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=new+super+mario+world+2+around+the+world+rom+download PDF link annotation
    • http://dayou.tw/uploadpic/files/202109180726496376.pdfIn PDF document text
    • http://studiocinti.eu/userfiles/files/6460778977.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/xesarutemofedimebaxuj.pdfIn PDF document text
    • http://25630638.kad.tw/kads/ckfinder/userfiles/files/rapir.pdfIn PDF document text
    • http://thekreativecompany.com/uploaded_files/userfiles/files/39941058397.pdfIn PDF document text
    • http://go-pxl.com/uploads/files/49390214214.pdfIn PDF document text
    • http://biosafety.biz/ckfinder/userfiles/files/xojoxizi.pdfIn PDF document text
    • http://alsace.annuaire-regional.com/ckfinder/userfiles/files/28673531686.pdfIn PDF document text
    • http://aquarium-kochi.com/app/webroot/ckfinder/userfiles/files/kopakufapevewivevediz.pdfIn PDF document text
    • http://www.optimizecost.com/admin/ficheros_fckedit_subidos/vivutomudum.pdfIn PDF document text
    • https://bisnismedsos.com/userfiles/file/90775136827.pdfIn PDF document text
    • http://korealabels.com/ckfinder/userfiles/files/lafutasewadoramu.pdfIn PDF document text
    • http://saktigroup.in/uploads/fejivazobuj.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/30347483510.pdfIn PDF document text
    • https://olterus.org/contents/files/74077258919.pdfIn PDF document text
    • https://sevenhillsgroup.net/ckfinder/userfiles/files/69593536738.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/d9a5e285f7f1c697c3dbbc900c952026/40563841898.pdfIn PDF document text
    • https://doxity.ro/ckfinder/userfiles/files/10640725021.pdfIn PDF document text
    • http://spy-military-labs.com/userfiles/file/kesinak.pdfIn PDF document text
    • https://ozora.schaffsen.com/contents/file/togarofom.pdfIn PDF document text
    • https://manusingh.org/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/voxozemakawaxogijoxarami.pdfIn PDF document text
    • http://geodavidepini.it/userfiles/files/80046992404.pdfIn PDF document text
    • http://olymp-kiev.com/temp/fckeditor/file/nafefesitilelim.pdfIn PDF document text
    • http://webinaris.eu/ckfinder/userfiles/publics/files/51204662844.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/35076216106.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_off0000df42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF42 10940 bytes
SHA-256: 478c71c80cea83e0a1fd9bffca6f0d00933d83b93416519b53786d889031fe17
font_01_sfnt_off0000f884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF884 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11096 17844 bytes
SHA-256: a1b8c5f30dfe3e31275a487b2284c45c82d87ef7ffeca7b82809bcb9d4d2af32