Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e5b6fc22bee87a9…

MALICIOUS

PDF

96.7 KB Created: 2021-06-03 22:15:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e3c28bcc23e3ff062efede70159e2b3d SHA-1: 488328d2a505752f72a989f51b8b9f19f5ddc140 SHA-256: 2e5b6fc22bee87a9bcd5b54deb3edc2e2790caf3d6886a5cd4a9352f96b072b6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high concentration on disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, possibly leveraging embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://soxebez.ru/123?utm_term=fifa+11+android++free PDF link annotation
    • https://titepusigob.weebly.com/uploads/1/3/5/3/135392267/genexubitosokewabab.pdfIn PDF document text
    • https://kusajigoma.weebly.com/uploads/1/3/6/0/136036420/lifimebilorewi.pdfIn PDF document text
    • https://vigelabed.weebly.com/uploads/1/3/4/3/134368569/lexuxavipij.pdfIn PDF document text
    • https://gepepokomireke.weebly.com/uploads/1/3/4/8/134892048/xalodexuwug_regutamus_xufosomixav.pdfIn PDF document text
    • https://jokimaxe.weebly.com/uploads/1/3/7/5/137513409/4739497.pdfIn PDF document text
    • https://lepafelazaxi.weebly.com/uploads/1/3/1/1/131164007/xalebadomot_mifevanupix_lozadijuse.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tusawijer.pbworks.com/f/building_monomers_of_macromolecules_marshmallow_lab_answer_key.pdfIn PDF document text
    • http://litorabi.pbworks.com/f/6571567225.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b322864b-ee33-4318-89dd-31d69240ac75/cfop_algorithms_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe0eeade-cd40-4719-93bb-14cd96556da6/44044030121.pdfIn PDF document text
    • http://lufokomarib.pbworks.com/w/file/fetch/144559611/how_to_change_oil_in_robinair_34788.pdfIn PDF document text
    • http://xuresasadox.pbworks.com/f/pofufovikogagu.pdfIn PDF document text
    • http://gaxoxim.pbworks.com/w/file/fetch/144574908/yugioh_duel_generation_hack_2019_ios.pdfIn PDF document text
    • http://mizelabe.pbworks.com/f/50275331690.pdfIn PDF document text
    • http://molosafokaji.pbworks.com/w/file/fetch/144544299/ditodusuzoki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/613529c4-da5f-4405-b56e-3dace30df7a6/27170989791.pdfIn PDF document text
    • http://mavujeridolu.pbworks.com/f/pubabofadetunofuwaxiwowo.pdfIn PDF document text
    • http://zemenifinabe.pbworks.com/f/17198002891.pdfIn PDF document text
    • http://zikasamu.pbworks.com/w/file/fetch/144463281/64465419741.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5077ba97-d826-4854-b834-3a8e9d7cb7d2/ford_windstar_2003_transmission.pdfIn PDF document text
    • http://doxawadar.pbworks.com/f/45967362310.pdfIn PDF document text
    • http://tagexoba.pbworks.com/f/los_paises_hispanohablantes_crossword_puzzle_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85cc1851-46d1-4cc7-9fa0-86abb374bcb0/zulejugegufetowadozigewaj.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_off00013d60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D60 4696 bytes
SHA-256: add32542cee5a63e6480b6d7eaf5fe0e35a6b5c369d770523bc2b63816353d8a
font_01_sfnt_off00014d72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D72 11932 bytes
SHA-256: c2e686a811d4ec1e3eef493617154ffdd33f09ebea6182003a7144ea585cc34c

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