Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeb2cfd9f0efd0e3…

MALICIOUS

PDF

72.7 KB Created: 2021-02-24 20:23:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 49439bc5db50492e434cdfdfbb67ec49 SHA-1: bc874e439b63b360ae6356bcb2c5c91cb7506bca SHA-256: eeb2cfd9f0efd0e3ffcbdb6f98567159a717404add0e5ffff773548ce6d0321d
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or malware distribution scheme. The presence of external URIs and the overall structure strongly suggest the document is designed to redirect users to malicious sites, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/strik?utm_term=producer+to+producer+maureen+ryan PDF link annotation
    • http://zefedupawomodos.22web.org/wibaradupogekefubibu.pdfIn PDF document text
    • http://ingmijn.com/onedrive_download_all_files_to_pcjjxxr.pdfIn PDF document text
    • http://national-verifyteam.com/rrb_admit_admit_card8bwhu.pdfIn PDF document text
    • http://baykamif.space/78689738169yj8uy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379491/normal_600b6576962db.pdfIn PDF document text
    • http://gnoogle.site/612464947461daep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488809/normal_5fe1d23d7af46.pdfIn PDF document text
    • http://badgesverified.com/amazon_seller_central_contact_numbert21gj.pdfIn PDF document text
    • http://hayatevesigar.online/busejabuguxewidscuzr.pdfIn PDF document text
    • http://cancandance.org/31385337427myq0p.pdfIn PDF document text
    • http://lesantyqas.online/not_just_for_elementary_order_of_operations_mazespl0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369786/normal_5fd11e332b2f2.pdfIn PDF document text
    • http://verifiedbadges-form.com/fifty_shades_of_grey_3_trailer_songpfb3l.pdfIn PDF document text
    • http://rotixumuzu.22web.org/development_finance.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388174/normal_5fd1705c5fcef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duzaxamikiziju.epizy.com/ek_bechara_film_song.pdfIn PDF document text
    • http://wulevizoreb.epizy.com/75581093754.pdfIn PDF document text
    • http://vorisenunajix.myartsonline.com/68692462215.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF39 5112 bytes
SHA-256: aaad73c0626808edc56df93ec38a3f5d169d16abb496dc56226449f826882f66
font_01_sfnt_off0000f08e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08E 11260 bytes
SHA-256: 0bcda1a684c4d07baee9fc031d1c1ad1b19ab1e7f2a7cc99e32b26fff86ab4d3

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