Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a6edc35744a2485…

MALICIOUS

PDF

80.9 KB Created: 2021-04-07 11:11:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ed110b3bb0f00f939432fee06b8f7a3 SHA-1: a2cc0da7c10fd1ef28cd59ee9c638f62c4e4039e SHA-256: 3a6edc35744a2485a5307d1ec5a95e263311a900e7dfcca380621222bae7b9ad
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains an embedded URI pointing to 'mezovuduw.ru', which is likely used to redirect the user to a malicious site. While no scripts were explicitly extracted, the presence of embedded URLs and the overall detection profile strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://mezovuduw.ru/wix?keyword=ella+enchanted+book+pdf
    • https://cdn.sqhk.co/nugizape/wyCGghf/260751579.pdf
    • https://cdn.sqhk.co/gejixoneku/jigfrlq/37501837147.pdf
    • https://cdn.sqhk.co/kidobogi/jfDhjgf/psychology_openstax.pdf
    • https://cdn.sqhk.co/tajugajobib/jg9ijid/xenuxoxadep.pdf
    • https://cdn.sqhk.co/navozaxezini/KVIgirv/cloudflare_dns_servers_1._0._0._1.pdf
    • https://cdn.sqhk.co/lomotutuwe/Vghq4gd/waterloo_battlefield_guided_tours.pdf
    • https://cdn.sqhk.co/gukitane/u5kGhd5/rap_beat_maker_recording_studio.pdf
    • https://cdn.sqhk.co/nijalemivowo/oNVDZMo/5238618903.pdf
    • https://cdn.sqhk.co/waxusuxagaki/difgjij/18323307453.pdf
    • https://cdn.sqhk.co/mubutuve/d40ihaj/zorulusakuma.pdf
    • http://fegivate.medianewsonline.com/25459600928.pdf
    • https://cdn.sqhk.co/dagosasojo/hgdiaM5/mystic_messenger_jumin_route_day_10.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://ritumogadoj.onlinewebshop.net/diet_plan_for_bodybuilding.pdf
    • https://s3.amazonaws.com/bisazabe/26590993867.pdf
    • https://s3.amazonaws.com/lokijuronig/sagojod.pdf
    • https://s3.amazonaws.com/zoluwivebiro/simplex_4100es_programming_software.pdf
    • https://s3.amazonaws.com/davawina/love_nat_king_cole_piano_sheet_music.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_off0000fe3d.bin
5f507fab0c2d9f77034ed53c5d532fb446fc543ff945431c44faea36d0f955c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3D 5128 bytes
font_01_sfnt_off00010fb2.bin
17efe64d0443b0b7df1a087302ed8832d027bcc53b65d8891b6c8a324c213c66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB2 11892 bytes

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