Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fe883f8458e42d0…

MALICIOUS

PDF

72.9 KB Created: 2021-05-13 10:40:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3d8e4a3efa9b5ed5e460ca102b0473a6 SHA-1: e9f77cadac2db291eefd6e03487bbdf6748c094f SHA-256: 2fe883f8458e42d02be973ece09e8e523e0345896fb6cedd38e1be809db4b723
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to disposable hosting services, suggesting a link farm designed to redirect users to potentially malicious content. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic further support this, indicating the document's primary purpose is to act as a lure for further compromise.

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://pelibifir.ru/strik?utm_term=at+the+cross+chris+tomlin+ukulele+chords PDF link annotation
    • https://xikobidena.weebly.com/uploads/1/3/6/0/136097244/849515f.pdfIn PDF document text
    • https://ruwijupoxotafan.weebly.com/uploads/1/3/0/8/130814308/wamuwote.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419633/normal_5ff4d6f32d64f.pdfIn PDF document text
    • https://cdn.sqhk.co/livulopo/dgh58ig/vuvogepunedofaze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403130/normal_5fd94a443c6ed.pdfIn PDF document text
    • https://cdn.sqhk.co/jixuvepabu/mB8hhjf/woxerizeliwafal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486975/normal_605fb79604611.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407318/normal_5ff05d2df3834.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406228/normal_606c397b3f5fb.pdfIn PDF document text
    • https://jifedusibifep.weebly.com/uploads/1/3/0/8/130813848/3031555.pdfIn PDF document text
    • https://cdn.sqhk.co/lexoxuxoluvi/Ef3YHhh/european_war_2_apk_free_download.pdfIn PDF document text
    • http://motivawka.online/936762860965c6qm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423715/normal_5fe1a8bcf00eb.pdfIn PDF document text
    • https://cdn.sqhk.co/dosijowikul/0UhhnOy/ansi_ashrae_ashe_standard_170.pdfIn PDF document text
    • http://getdouche.xyz/derugafajaburef21lsv.pdfIn PDF document text
    • https://ruxosegid.weebly.com/uploads/1/3/4/2/134265817/9937842.pdfIn PDF document text
    • http://alcozerox.com/analisis_literario_del_cuento_funes_el_memorioso2jcpd.pdfIn PDF document text
    • https://cdn.sqhk.co/ginijetemepa/ichhgeJ/free_bible_coloring_pages_joseph_in_egypt.pdfIn PDF document text
    • http://life-news.tech/xunaretuzavipuc72yp.pdfIn PDF document text
    • http://ashotik.space/can_someone_fake_caller_idvoeq6.pdfIn PDF document text
    • http://vvinorama.fun/im_supposed_to_or_im_suppose_toeyr9q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405186/normal_5fc93d066a422.pdfIn PDF document text
    • http://pressit.fun/65574264189xjdgz.pdfIn PDF document text
    • https://potunajasufa.weebly.com/uploads/1/3/1/3/131381619/fapuza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE001 5024 bytes
SHA-256: cad96ed2b10559407d7a827521b4563415835c0df8b7587e576e036bf2adc81b
font_01_sfnt_off0000f0e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E8 10912 bytes
SHA-256: 228895446c5069d3a97efd84cef0477bf26f5692927e80a23fe55fcef27b1909

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