Malicious PDF — malware analysis report

Static analysis result for SHA-256 402ee2fc745b97a5…

MALICIOUS

PDF

140.0 KB Created: 2021-09-11 18:46:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6c67801fb27db0bcbcf729c59295b019 SHA-1: 850942f027f45dd58fa34433fcd13476725b832e SHA-256: 402ee2fc745b97a5e2095fb8bcaa781e690db950b4aba2c45ed00dc6060a8619
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains numerous links to disposable domains, characteristic of a link farm used to obscure the final malicious destination, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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://dialogueinpraxis.net/files/docs/dexakiworagesizoje.pdf In PDF document text
    • http://musorcentrum.hu/files/article/file/fukulezatowufi.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/pexoxevapif.pdfIn PDF document text
    • http://smartdeal.pl/files/upload/files/19969912519.pdfIn PDF document text
    • http://szm.hu/userfiles/file/xetunalerudumuwi.pdfIn PDF document text
    • http://njchemland.com/upload/files/satefe.pdfIn PDF document text
    • https://lenaoyunlar.com/calisma2/files/uploads/wewedoseludowinux.pdfIn PDF document text
    • https://ecoverservice.be/gallery/file/74499244877.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/febimipinidutijoliruxuzun.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b82af972ef---17888327491.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/18587534454.pdfIn PDF document text
    • http://karinameal.ru/imgdish/files/39882365760.pdfIn PDF document text
    • https://autotronics.vn/userfiles/file/41151706410.pdfIn PDF document text
    • http://cerescommoditiesltd.com/Images_upload/files/70564782296.pdfIn PDF document text
    • http://griesvoegwerken.nl/UserFiles/file/loditopixe.pdfIn PDF document text
    • http://maidichike.com/upload/files/64407511416.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/809d7393524dd80e72e5a681faacbdad/kufuwewogexi.pdfIn PDF document text
    • http://omnoiptv.com/outscapes/admin/ckeditor/uploads/ck/files/17146954501.pdfIn PDF document text
    • http://jj-metals.com/userfiles/file/2021090316170073499.pdfIn PDF document text
    • http://etyekilovarda.hu/userfiles/file/80526348029.pdfIn PDF document text
    • http://templeton.sk/userfiles/file/78149987000.pdfIn PDF document text
    • http://studiofantino.it/userfiles/files/73447981922.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=vishnu+sahasranamam+lyrics+pdf+englishPDF 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_off0001c034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C034 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001d846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D846 18936 bytes
SHA-256: e1a1af43c995f6f8cc94e332b0655ed9e6e8442ed717e1eae637db259554118a
font_02_sfnt_off000208ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x208BA 11032 bytes
SHA-256: 16712219b136e9ecb538a66522028eff82b848e4fdf3f1f7ce1ff30b0e7b3e72

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