Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ad7042f9f9b9aa5…

MALICIOUS

PDF

69.9 KB Created: 2021-04-17 22:03:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60bbe0d95c723b5c4c984df4f1c5c526 SHA-1: def52be095ec2993afef84276e78f35128f6b321 SHA-256: 6ad7042f9f9b9aa5c7f3a6f36919d784417b53736d98b9dacf7ec4647c14d36c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of external links, suggesting a link farm designed to redirect users to potentially harmful websites. The embedded URL `https://jumiwimov.ru/strik?utm_term=avital+7352l+valet+mode` is likely part of this redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/strik?utm_term=avital+7352l+valet+mode
    • https://cdn.sqhk.co/pobopuwubox/ndcfibu/samowugenuzakisovidez.pdf
    • https://cdn.sqhk.co/jisepozidis/wHhe34v/bad_banks_staffel_2_auf_netflix.pdf
    • https://cdn.sqhk.co/xixujipum/8WgjVUf/dragalia_lost_tier_list_august_2020.pdf
    • https://cdn.sqhk.co/sukonazukuv/2jbjfhi/kikujodazemodowir.pdf
    • https://cdn.sqhk.co/tigixexaxi/6v6fijG/calendar_2020_malaysia_school_holiday.pdf
    • https://sukaxivex.weebly.com/uploads/1/3/4/8/134895869/madiguxamubiso.pdf
    • https://cdn.sqhk.co/goxobuve/hxqQlxB/zapabifupuvuwigodexo.pdf
    • https://cdn.sqhk.co/gilikomow/iheiejj/19226097960.pdf
    • https://cdn.sqhk.co/verexoleki/idJkhfY/15354208404.pdf
    • https://bevarolemi.weebly.com/uploads/1/3/4/6/134685224/3843133.pdf
    • https://cdn.sqhk.co/sedazozesufu/hihbljj/67177406581.pdf
    • https://cdn.sqhk.co/rubalibuzodi/hfgighW/journey_map_template.pdf
    • http://vikiduxa.mywebcommunity.org/63035801797.pdf
    • https://mimejomukokije.weebly.com/uploads/1/3/4/5/134510045/7715271.pdf
    • https://cdn.sqhk.co/bokirebi/aEgi9TA/guitar_rock_and_roll_cake.pdf
    • https://cdn.sqhk.co/kuwusemob/CtgeAkE/xujugu.pdf
    • https://sizigemud.weebly.com/uploads/1/3/4/6/134606095/abba92aa081897.pdf
    • https://cdn.sqhk.co/xasurila/Sjdighd/fopaluwet.pdf
    • https://cdn.sqhk.co/dosakupu/f38NVgg/movie_box_apple_tv.pdf
    • https://cdn.sqhk.co/kobewudojuvo/5ODhjii/torn_rotator_cuff_treatment_uk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://merapenerabari.myartsonline.com/atresia_intestinal_adalah.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_off0000d299.bin
31302e324675fb6e13f58f9de227b25a6653b10867481d5874fe869e48a2d5d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD299 5244 bytes
font_01_sfnt_off0000e476.bin
6708101bb5bad3bf192899f0da8b2355d2691cfd8d50ff44df5905f06115876f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE476 10696 bytes

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