Malicious PDF — malware analysis report

Static analysis result for SHA-256 49462e0795c665be…

MALICIOUS

PDF

85.0 KB Created: 2021-04-21 08:10:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 884653b1a011c8c618902bed0b48476f SHA-1: 08a8225da75c2e0183cbf071a0e7da807bf091ab SHA-256: 49462e0795c665bea71910a974eb4f90f81ba611cfc322d6c9d0fda44e603372
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs and heuristics indicate it functions as a link farm, directing users to potentially malicious domains. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://baarspo.ru/strik?utm_term=how+to+hook+up+dish+network+to+tv+2 PDF link annotation
    • https://cdn.sqhk.co/madufuxenuw/jg1wSha/rush_copley_pediatrics.pdfIn PDF document text
    • http://tgesheff.xyz/merilozefuzakux6gea.pdfIn PDF document text
    • https://torovuzexas.weebly.com/uploads/1/3/2/7/132710592/zavavis.pdfIn PDF document text
    • http://allwoman.site/fatorobeferokoregile61ckc.pdfIn PDF document text
    • https://rudabukonavapuk.weebly.com/uploads/1/3/4/0/134016662/rogeta.pdfIn PDF document text
    • https://biwewonopegad.weebly.com/uploads/1/3/1/3/131380063/lejisaki-zofifu.pdfIn PDF document text
    • https://budojidotepaso.weebly.com/uploads/1/3/5/3/135312143/9ab8440758.pdfIn PDF document text
    • https://cdn.sqhk.co/jisogixij/LThbmO8/31838353675.pdfIn PDF document text
    • https://cdn.sqhk.co/zalopubid/jfjeajc/equalizer_fx_pro_apk_rexdl.pdfIn PDF document text
    • https://cdn.sqhk.co/seponidozit/ahfCrt1/bluetooth_switch_for_lights.pdfIn PDF document text
    • http://creditactive.info/cules_son_los_alimentos_que_ms_engordan3olv4.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/ggSEyON/22971839000.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1a180d0-968a-475a-b9a9-38fc9c2a00dc/36444222501.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93fb4373-fee0-493b-9e38-212c5e21f745/nirole.pdfIn PDF document text
    • http://fefirujo.rf.gd/five_functions_of_language.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/18882180951.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/film_a_frozen_flower_subtitle_indonesia.pdfIn PDF document text
    • http://zesirina.rf.gd/ligeia_edgar_allan_poe_english.pdfIn PDF document text
    • https://s3.amazonaws.com/timituvupame/dagizupukigerigewa.pdfIn PDF document text
    • http://daboloxasorun.rf.gd/plural_nouns_worksheets_2nd_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a29b4c22-08f2-4757-ba06-f0a9311d5c7b/how_to_set_water_softener_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3b16699-5cac-463d-b0ae-d399053337a2/life_as_a_peasant_woman_in_the_middle_ages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec353ab4-3953-4a68-a8c2-561bc244ca12/zifesoxizopowezaxa.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF840 5112 bytes
SHA-256: 4c992a38a697e8b54257832d79f6c49acd25543d507bdcc19fef3e1c7a52ebe5
font_01_sfnt_off000109ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BA 11512 bytes
SHA-256: 8f86176e784fb03ec2729b2005988662fdb6076d1747c6d351846e7561a6dd3a
font_02_sfnt_off000130ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130AC 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e