Malicious PDF — malware analysis report

Static analysis result for SHA-256 14f9c404f67d5d27…

MALICIOUS

PDF

75.2 KB Created: 2021-02-24 10:04:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 188a405962b4cc63531dfb6ef41214c7 SHA-1: 44ea81d55020271b48c7054999ca8a7ef54ea3cb SHA-256: 14f9c404f67d5d27f0e0cdd4e8cafc4d909e40f4f9db8f09009d295da470a298
146 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. It contains numerous embedded URLs and is identified as a link farm on disposable hosting, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, contains a title that appears to be a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://jacksth.ru/strik?utm_term=sex+starved+marriage+youtube PDF link annotation
    • https://wedarudojov.weebly.com/uploads/1/3/4/0/134012757/gifetijokemifoguj.pdfIn PDF document text
    • http://dayzcommunity.info/xumoninamosumis8cur1.pdfIn PDF document text
    • http://businessoutsourcing.org/90635031797eo761.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447669/normal_6011ef47955c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426676/normal_5fc6f37dd81c3.pdfIn PDF document text
    • http://muldwych.com/5869471334477od9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370073/normal_602b262ecbc67.pdfIn PDF document text
    • http://raisinshub.club/humminbird_piranhamax_197c_di_transducerzuqos.pdfIn PDF document text
    • https://sixikubirosepup.weebly.com/uploads/1/3/3/9/133997641/2651515.pdfIn PDF document text
    • http://xisulekotitis.iblogger.org/17514858393.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412161/normal_5fcf34924cabd.pdfIn PDF document text
    • http://lnstagrambusiness.com/linear_equations_in_standard_form_worksheet_penguinqs9et.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447270/normal_602e52b7f34f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388293/normal_5fdb3a21547ec.pdfIn PDF document text
    • https://vumokaxizojomij.weebly.com/uploads/1/3/2/6/132680848/lalurexitil.pdfIn PDF document text
    • https://totidulabi.weebly.com/uploads/1/3/1/6/131606487/a47873.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://noboxiroxe.epizy.com/jogos_offline_para_pc_fraco.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_off0000e929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE929 5588 bytes
SHA-256: 989e1a70bd447b7134f486ca8ef7e9eafa2777b252f24f4ded42b90c4c8d9325
font_01_sfnt_off0000fc27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC27 10424 bytes
SHA-256: 0eccc3200593c5a09198c41462c9e4dfef42beda8e84d99dcfd90b12326a20e2

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