Malicious PDF — malware analysis report

Static analysis result for SHA-256 47ab12b04239f9a1…

MALICIOUS

PDF

82.7 KB Created: 2021-01-26 05:46:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4c0b39e9563b3fa3eca4163bd279f424 SHA-1: c1be32c11bd0054b5b2b831c30dd133811fc5baf SHA-256: 47ab12b04239f9a108c807db4094f975dcdf9c9e9249b93c1ac914d8bc497efa
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The presence of embedded URLs and the 'link farm' heuristic suggest the primary purpose is to redirect users to potentially malicious websites. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/123?utm_term=portable+air+compressor+lowes PDF link annotation
    • http://naturalik.fun/download_extreme_car_stunts_3d_mod_apkh1hkb.pdfIn PDF document text
    • https://cdn.sqhk.co/kejopala/ehhjgjg/balagorovo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470696/normal_5ff666e2e06d8.pdfIn PDF document text
    • http://helplnstagramcontact6088756.com/tiwupejb7sh.pdfIn PDF document text
    • http://wixiziz.iblogger.org/83225343717.pdfIn PDF document text
    • http://rastet-malysh.ru/background_eraser_tool_photoshop_tutorialrbu09.pdfIn PDF document text
    • https://cdn.sqhk.co/supesuvepo/hcwhemm/ladasivixamugere.pdfIn PDF document text
    • https://pojirada.weebly.com/uploads/1/3/2/7/132741169/putuvibidetove_wisaze.pdfIn PDF document text
    • https://gaxatibixowoki.weebly.com/uploads/1/3/1/4/131452935/1849905.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417536/normal_5fd8e302119d3.pdfIn PDF document text
    • http://forexgeeks.net/ted_bundy_movie1qg33.pdfIn PDF document text
    • http://stickerrus.ru/khan_academy_sat_prep_reading_history_answers50z58.pdfIn PDF document text
    • https://ditomivowulute.weebly.com/uploads/1/3/4/6/134679561/b77122c50ccd.pdfIn PDF document text
    • http://brandframeb.com/94430251621rrwz8.pdfIn PDF document text
    • http://kuroramogesok.iblogger.org/falonuginofidezerukuj.pdfIn PDF document text
    • http://dhl-order.info/aio_launcher_unlocked_apkqmkqi.pdfIn PDF document text
    • http://nigma24invest.online/world_war_two_a_short_historyqi14h.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zekovulelopur.epizy.com/tupubesaru.pdfIn PDF document text
    • http://zelogano.epizy.com/65469016256.pdfIn PDF document text
    • http://pazatirademe.rf.gd/treatment_of_bunionette_deformity.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_off00010620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10620 5312 bytes
SHA-256: 9d3ceefef2568d70e02a9abd936de8a8b836d1b7418e1b56657cc22403c5088c
font_01_sfnt_off00011823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11823 10952 bytes
SHA-256: 265c0f62d6ec725a255343ab5d6cc77e26f4ed5f3890eb5cee4692407746e6ba

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