Malicious PDF — malware analysis report

Static analysis result for SHA-256 41458596d6ddd67c…

MALICIOUS

PDF

77.3 KB Created: 2021-04-04 17:09:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c48afb3d6f5da9898cf5fd3f10a45dca SHA-1: d8f91bd9c9ad834abbf6658f46c1a5a8281d0dcb SHA-256: 41458596d6ddd67c49a43c8d26ff0bf69ba3fd8bea6a255cda15f27dce0f6d47
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to suspicious domains and are likely part of a link farm designed to host phishing content or malware. The document body, though heavily obfuscated, contains keywords related to "hack free fire auto headshot," suggesting a lure for users seeking cheats or exploits. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or a trojan downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/wix?keyword=hack+free+fire+auto+headshot
    • http://f13x.xyz/70186619573iyboj.pdf
    • https://xavujome.weebly.com/uploads/1/3/0/7/130739328/5408322.pdf
    • http://niburufajanuto.sportsontheweb.net/wagopiribagajifebiverar.pdf
    • http://bottlechainworld.com/kazobamanivol9ixd.pdf
    • http://rubivof.22web.org/58575622330.pdf
    • https://gogozofoful.weebly.com/uploads/1/3/4/5/134512065/7819418.pdf
    • http://kizunawinim.getenjoyment.net/article_in_english_grammar.pdf
    • http://dokeximikeveved.iblogger.org/protein_structure_book.pdf
    • http://storedubai.shop/catholic_altar_server_guidel62h1.pdf
    • http://beririka.scienceontheweb.net/bavafuvaxajus.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/muvevanepen/how_much_do_wayne_dalton_garage_doors_cost.pdf
    • https://s3.amazonaws.com/retobifulipo/vijay_awards_2010_full_show.pdf
    • https://s3.amazonaws.com/wupuxus/winrar_free_64_bit_windows.pdf
    • https://s3.amazonaws.com/mawesenasijoser/dunefelu.pdf
    • https://s3.amazonaws.com/wovigebi/93558134203.pdf
    • https://s3.amazonaws.com/tejuvonixag/rekugavubabo.pdf
    • https://s3.amazonaws.com/fomaralunex/free_after_effects_templates_photo_book.pdf
    • http://povodakav.myartsonline.com/newspaper_business_plan_sample.pdf
    • https://s3.amazonaws.com/sonutopexaramuf/1993_toyota_pickup_repair_manual.pdf
    • http://xenezipulugiji.atwebpages.com/vidaxasukapivelezega.pdf
    • https://s3.amazonaws.com/rorives/20737883940.pdf
    • https://s3.amazonaws.com/muvazi/68570704082.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_off0000f015.bin
a6ab2179b7a1893299573c02e6968e74b7f6dc2241dca0c1c5fc26fbae3588db		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF015 5104 bytes
font_01_sfnt_off00010169.bin
3e87b1f834f74af9319058334fe830a24d40a4da3761a334648a7af372facce8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10169 10800 bytes

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