Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc42494ea0dd1bf3…

MALICIOUS

PDF

107.3 KB Created: 2021-02-12 00:50:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 32133a5e83a4d90d23923b459dd420b8 SHA-1: 81f7d25d193cb584c3124d641ab46aefceb74171 SHA-256: fc42494ea0dd1bf3ff07982045b76508a2cd5c0002dbdef6890ca43aaeb91427
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant portion hosted on disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with a phishing or malware delivery mechanism, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://bologen.ru/123?utm_term=mandala+of+hindu+beliefs PDF link annotation
    • http://fresh-ita.fun/clue_words_for_multiply84go9.pdfIn PDF document text
    • https://cdn.sqhk.co/padasagam/dqAuhd2/letterboxd_delete_profile.pdfIn PDF document text
    • https://cdn.sqhk.co/worenora/Rhj3fgc/draughtsmanship_courses_in_mauritius.pdfIn PDF document text
    • https://cdn.sqhk.co/togokitaz/HHRhhV7/can_you_use_milk_paint_over_stained_wood.pdfIn PDF document text
    • https://cdn.sqhk.co/poladejug/jhfxhiB/vosolatedavivelonaj.pdfIn PDF document text
    • https://cdn.sqhk.co/vevigagexoxa/0o3X85q/uncertainty_principle_practical_example.pdfIn PDF document text
    • https://cdn.sqhk.co/xatijafuwami/dRlo0wq/79540685619.pdfIn PDF document text
    • https://cdn.sqhk.co/weruvewo/jj1LCjf/ps4_remote_play_controller_support.pdfIn PDF document text
    • https://cdn.sqhk.co/fosojatesog/jggtvY8/horror_film_movie_quiz.pdfIn PDF document text
    • http://prolac.ru/pathfinder_simulacrum_guide80eju.pdfIn PDF document text
    • http://kataeta.club/3389643236dd219.pdfIn PDF document text
    • http://gobigs.space/dodifopapevinerawi4m55.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/catapult_king_apk_revdl.pdfIn PDF document text
    • http://nizalag.rf.gd/32260693610.pdfIn PDF document text
    • http://vobewegogiz.rf.gd/asbestos_roofing_sheets_sizes.pdfIn PDF document text
    • http://wokeben.epizy.com/69919981666.pdfIn PDF document text
    • http://xuramilipadig.rf.gd/63715119191.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/nowefoparufiza.pdfIn PDF document text
    • http://bakotisimipivok.rf.gd/stardew_valley_fish_tank_bundle_guide.pdfIn PDF document text
    • http://puwiliguso.rf.gd/45542255741.pdfIn PDF document text
    • http://gopikobupi.epizy.com/vopefugok.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14276 6708 bytes
SHA-256: 9c4b81e4b7dd41b97595049c99a903e1e59822d8a1f37ac3299ea3a030d4b001
font_01_sfnt_off000158d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158D9 5044 bytes
SHA-256: f999914c19e9f5478733142b2659a26fbbbb5751574025af9aa36c3480637508
font_02_sfnt_off00016a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A09 13460 bytes
SHA-256: dc283f8980d73c0205c8aa5ca3ea936a467f48f2a7976af7ecbf73670447b0d5
font_03_sfnt_off000193af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193AF 2720 bytes
SHA-256: d239eca342254eea7fc297a78ee94579505c294379a3801f1561ec2621211a28

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