Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cc8249f4b9cf8a0…

MALICIOUS

PDF

80.7 KB Created: 2021-04-16 08:31:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 4c32cc3808aa3de9668ae6db7ff2c7c9 SHA-1: 25d9f52fdc56d8d8b8596fc1841f05452f2a8648 SHA-256: 6cc8249f4b9cf8a0e46e36086d891615327aea3355cdab7f18f52984d76f86e7
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious content. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm designed to redirect users to potentially harmful sites. The presence of external URIs and the 'link farm' heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gimoguvi.ru/strik?utm_term=leap+into+the+abyss+meaning PDF link annotation
    • http://tetizeniwa.mypressonline.com/doxifa.pdfIn PDF document text
    • http://sparzha.club/36479302603tv6c5.pdfIn PDF document text
    • http://chtotakoevuxom.biz/pudozewivokedijonimopqwwsk.pdfIn PDF document text
    • http://bumaga.bz/89753246257hf2l2.pdfIn PDF document text
    • http://airet.space/masozukisiwido4018v.pdfIn PDF document text
    • https://cdn.sqhk.co/giwumazusew/jv9hcja/luwoporuzupawuvuboxer.pdfIn PDF document text
    • http://girlsbeach.space/apologizing_in_englishypwbd.pdfIn PDF document text
    • http://iwhite.space/bifenajodaronu6olbj.pdfIn PDF document text
    • https://cdn.sqhk.co/zisujidixa/RLYvKic/64404027602.pdfIn PDF document text
    • http://blue-tick-central.com/world_map_picture_decork4kej.pdfIn PDF document text
    • http://bebetadiruj.mywebcommunity.org/numerical_aptitude_test_questions_and_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxugaveg/ePfifNQ/agent_a_a_puzzle_in_disguise_sequel.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/025d7516-6826-4fae-9d3d-b698807cea11/how_much_does_a_teacher_earn_in_south_africa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/698618fc-0e46-4778-81ce-1ba08245b1a0/68267918842.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a0b4333-41ae-4dcd-b377-c6236622fe7c/does_allegiant_air_have_wifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4402f06f-dbad-42ad-bdab-971828bffb6a/55100709588.pdfIn PDF document text
    • http://makijozexu.rf.gd/auditor_independence_and_audit_quality.pdfIn PDF document text
    • http://wuburujezajewix.epizy.com/who_kidnapped_janie_in_the_face_on_the_milk_carton.pdfIn PDF document text
    • http://lufopudizomuv.atwebpages.com/differences_between_american_and_british_english_grammar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcbbfe14-a37f-4eea-8232-8c6cf087ef7b/hp_designjet_500_service_manual.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB6 5288 bytes
SHA-256: b661b05f1ea663f4fd5b043d1392fb5ffe1093ad3e1a2831d913bcb661ff66c4
font_01_sfnt_off00010f9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F9B 11284 bytes
SHA-256: 80d822f3bca8f3a29c92ec5f72c56c0988a149fadd905e20245e374b8e8749c0

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