Malicious PDF — malware analysis report

Static analysis result for SHA-256 a61363d28f9682a2…

MALICIOUS

PDF

113.2 KB Created: 2021-03-12 09:09:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2b6a26af4170e019304dcdaa78bde25 SHA-1: b94832b91041b24ce4678253e1f96cc95b3ab839 SHA-256: a61363d28f9682a2464632f8b6b8187695dc9a3bd991fb6ddced53fe74581fb1
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing attempt. It contains an embedded URL that directs users to a site disguised as a manual for a Chauvin Arnoux device, likely to trick users into downloading further malware or revealing sensitive information. No scripts were extracted, but the PDF structure and embedded URI are strong indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • 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://ponafet.ru/123?utm_term=chauvin+arnoux+ca+8335+manual
    • https://static.s123-cdn-static.com/uploads/4389571/normal_5ffa89a6a10f5.pdf
    • https://static.s123-cdn-static.com/uploads/4371553/normal_5ff683c5bc764.pdf
    • https://cdn-cms.f-static.net/uploads/4467927/normal_600d4197350cb.pdf
    • http://movajapenakinu.22web.org/bootstrap_dashboard_template_bootsnipp.pdf
    • https://cdn-cms.f-static.net/uploads/4425759/normal_5fd679dd07aa5.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/dd408081-a800-451f-a143-8d2b1f3559c7/38061225261.pdf
    • https://uploads.strikinglycdn.com/files/0651b844-74b8-43d8-97c1-cbc89be255a1/87128754059.pdf
    • https://s3.amazonaws.com/jiguwuzobozobaz/14166065288.pdf
    • http://damatagowigiz.epizy.com/sopanaxi.pdf
    • https://uploads.strikinglycdn.com/files/c05b45e1-8223-4c01-9e92-74faca6b144f/how_to_check_pandemic_ebt_status.pdf
    • http://bixodog.rf.gd/mevunexeseneg.pdf
    • https://s3.amazonaws.com/salade/88816477887.pdf
    • http://sisudol.rf.gd/urdu_blogspot.pdf
    • http://fanuzisi.epizy.com/briggs_and_stratton_pressure_washer_oil_capacity.pdf
    • https://uploads.strikinglycdn.com/files/a4a0610b-0abc-4f7a-86d9-36816dea05cd/6208129541.pdf
    • http://pewaxoxepizus.rf.gd/game_blur_apk_data.pdf
    • https://uploads.strikinglycdn.com/files/8073a400-1fff-42e4-81bf-7144e5f92136/81077492528.pdf
    • http://zezewesiwakoruw.rf.gd/kobozisudufuwesifesof.pdf
    • https://uploads.strikinglycdn.com/files/5a995dbc-781a-41c1-b24c-f1f2bb51bb22/how_to_check_a_golf_cart_controller.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014c21.bin
ce96b12e9915ae00788165bdc898c8313e64b942c5fb2cd6e51536d4bdd2f265		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14C21 2948 bytes
font_01_sfnt_off00015696.bin
bed7ab525e3c3c1b1a28fb70a1c206cc453aec33f189ce06b7186052e793efcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15696 2144 bytes
font_02_sfnt_off0001601d.bin
b9ab4af164dcb3e8829d3b2f66d838f2c5012bba676595ee9627ffa09761c7b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1601D 5376 bytes
font_03_sfnt_off00017241.bin
9776a21d5962afa8799708bf3a2e236649be99ea734bf7898ebc792ad146eae0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17241 14532 bytes
font_04_sfnt_off0001a02a.bin
f3616d7efc3006c040c18d1fe214d104ff10d1612a65c7c0008958d16ebe8275		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A02A 16416 bytes

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