Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8e8e5d316c176a0…

MALICIOUS

PDF

73.1 KB Created: 2021-03-27 17:22:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: af6b4e51600d7ba7107d2d3ebb408ceb SHA-1: b41d0a78ddab16757c832b2b0270582db103d6b0 SHA-256: b8e8e5d316c176a0f1e46c24526471fe750bcd0414131767eb2ab0e76b0e0239
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, with a prominent one leading to a site that appears to be a link farm for game-related content, likely a lure. The document body, though heavily obfuscated, suggests a connection to game answers, reinforcing the phishing pretext. No scripts were extracted, but the PDF structure itself facilitates the redirection to malicious URLs.

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://pelibifir.ru/123?utm_term=logo+game+level+26+answers PDF link annotation
    • https://cdn.sqhk.co/vefemonuru/kpkZ0cT/2013_cadillac_cts_performance_specs.pdfIn PDF document text
    • http://kepukarob.sportsontheweb.net/blastocystis_hominis_traitement.pdfIn PDF document text
    • https://cdn.sqhk.co/posebozej/hbjfzG2/element_flow_game_answers.pdfIn PDF document text
    • http://tuzirifuxeza.iblogger.org/kolup.pdfIn PDF document text
    • http://rumagadoli.22web.org/vefilurawix.pdfIn PDF document text
    • https://cdn.sqhk.co/bawivurolut/dSuzghs/axa_insurance_oman_claim_form.pdfIn PDF document text
    • http://giwudogor.scienceontheweb.net/xigudis.pdfIn PDF document text
    • http://socialwave.me/kavogisurarmvvo.pdfIn PDF document text
    • http://instacopyrighthelpteam.com/gt6_save_editor0whr1.pdfIn PDF document text
    • https://cdn.sqhk.co/mudixeguda/iiejdhi/jelovizotagazukok.pdfIn PDF document text
    • http://panedapupugaxe.22web.org/exponent_worksheet_kuta.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ad9f1622-e3b7-49db-bfef-326c48fb2104.filesusr.com/ugd/a467d2_e5a09be09b0c4f679d46941992402f00.pdf?index=trueIn PDF document text
    • http://donijexufenu.onlinewebshop.net/us_history_chapter_23_test_quizlet.pdfIn PDF document text
    • https://115777a2-cc0e-4789-9e99-30cf4bdfca1a.filesusr.com/ugd/2b3546_9792fc23bb054afaba0454594736690b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/akiba_s_beat_trophy_guide_and_roadmap.pdfIn PDF document text
    • https://f856bbc4-01c8-45e4-8891-a53c5ee59fd0.filesusr.com/ugd/8e827e_2e7406530315454b88f14e3571984fc6.pdf?index=trueIn PDF document text
    • http://kuwijiti.myartsonline.com/94639337892.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/50622463896.pdfIn PDF document text
    • https://eadb47d6-6712-4ecd-aa5a-2cdcf2d90b86.filesusr.com/ugd/c844bf_3bc800f27af141e29abbdfde6ed63da3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/zulozivazek.pdfIn PDF document text
    • https://eb72eaa1-ef55-40a3-a653-f6d21bccf295.filesusr.com/ugd/54913d_7c6f1b42722c401cbcf4ce1701d2b3b7.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3B 5384 bytes
SHA-256: 187c866d979866c919d5c3e370275757c2b4c63e681070b096a4ee36ddcb54d5
font_01_sfnt_off0000f198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF198 10988 bytes
SHA-256: 025203b643ec5491ebe5a2cddc8c225f03cc46ed1ed8ebec6fdbddae8e93db04

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