Malicious PDF — malware analysis report

Static analysis result for SHA-256 1341b7958cd2550a…

MALICIOUS

PDF

85.4 KB Created: 2021-03-17 16:12:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd58c3fecbfbf329f4d962b2f80ec96b SHA-1: b5e561077b40deb82fc5bfd81c69d4fe5c1564ca SHA-256: 1341b7958cd2550aef7be6a0d663e4dd88cc40994941f44211eb32f1ca8d7268
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing malicious payloads. Heuristics indicate a link farm on disposable hosting, and ClamAV detected it as Pdf.Phishing.Trojan. The ML classifier also flagged it with high confidence. The document body is heavily obfuscated and does not provide clear textual lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://druttle.ru/award?keyword=attributes+of+god+tozer+free+pdf
    • http://miraluvofizobe.medianewsonline.com/xebujug.pdf
    • http://hotsales-com.xyz/star_wars_forged_in_battlexnrij.pdf
    • http://lemiritafuwab.22web.org/happy_new_year_song_tamil.pdf
    • http://sallehq.xyz/creswell_research_design_5th_edition_citation1alle.pdf
    • http://vewefoma.getenjoyment.net/pugasowufurelosep.pdf
    • http://xafesuvorolivig.scienceontheweb.net/lirakugewululebejebisi.pdf
    • http://penaleduduzib.iblogger.org/83851014128.pdf
    • http://teatr-art.com/954327458ww9zu.pdf
    • http://raifaisentgo.online/43606454728ry9rf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jibomivuren.epizy.com/xujugawasesovumup.pdf
    • http://tenagomujebat.rf.gd/which_boron_is_more_abundant.pdf
    • https://uploads.strikinglycdn.com/files/94d6150a-fa6e-4fbb-9f70-ff09e9a4b678/what_cycle_should_i_use_to_clean_washing_machine.pdf
    • http://zevusup.atwebpages.com/19203788507.pdf
    • https://uploads.strikinglycdn.com/files/d94678f8-0e60-4cbf-98d1-7432a7030030/47531906924.pdf
    • https://d848e4b6-662b-4424-a759-963270729452.filesusr.com/ugd/30e015_19bfc4bd24494d448a727c9e96be5216.pdf?index=true
    • http://verofibigo.epizy.com/how_to_make_logitech_k400r_discoverable.pdf
    • https://uploads.strikinglycdn.com/files/8904f67c-7184-4ed2-bf96-47ff1dd09cd0/49057679303.pdf
    • https://d4078116-a2d5-466f-97e6-20d899f6ca30.filesusr.com/ugd/576447_3c37313e7a2b44bfa74e09b21e32e801.pdf?index=true
    • http://kobizesamow.rf.gd/bilingualism_in_development_language_literacy_and_cognition.pdf
    • https://uploads.strikinglycdn.com/files/51f94078-c7cf-492a-9416-f082c5e60028/detasebufonapuxebogov.pdf
    • https://uploads.strikinglycdn.com/files/ee560fc5-0182-4865-b0c0-85eed96762a3/zosud.pdf
    • https://2a497570-3881-454f-aefc-229a18bbdf22.filesusr.com/ugd/83e24f_c27f67b627514284b42111afac2e29af.pdf?index=true
    • http://daparetefofan.epizy.com/xogujagasizatejibusalab.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011118.bin
169abc0bd6dea83ed31e4169cd7cb7dcf8fc86ec87248982688dfca35fea3209		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11118 5148 bytes
font_01_sfnt_off000122b0.bin
6f5cc403253f663f4fff43a39c470a5fd0a021a212e075861c0a779556bb2a37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122B0 10968 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.