Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c5170f2fbb874ad…

MALICIOUS

PDF

196.0 KB Created: 2021-05-08 03:21:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c5db2e90c59ad36514b8ae208e438228 SHA-1: 7b085b433e12f5e6961308cf88c07558949a9cca SHA-256: 9c5170f2fbb874add87acca86f66865846978e7a92d7b8f1118e495c150e3252
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'zajinet.ru', which is likely a malicious domain used to host or redirect to a secondary payload. The document body, though heavily obfuscated, suggests a lure related to a technical manual, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://zajinet.ru/strik?utm_term=intel+guardfish+dq965gf+manual PDF link annotation
    • http://fb-copyright-help-from.com/ben_ten_alien_force_apk74hq1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370269/normal_5fd7a6c39177b.pdfIn PDF document text
    • http://gallery-shop.site/vifozutexujajelesoduuwcox.pdfIn PDF document text
    • http://sale-siberian-force.online/703769502091p071.pdfIn PDF document text
    • http://drenajkrasnodar.ru/65513436205sxyha.pdfIn PDF document text
    • http://am-sound.ru/fizezivrkzox.pdfIn PDF document text
    • http://feedbacrnz.space/gewotixojajr5sm.pdfIn PDF document text
    • http://wownatural.fun/30940887401957xa.pdfIn PDF document text
    • http://reactivaperu-viabcpi.com/kenmore_elite_dryer_replacement_parts0kexj.pdfIn PDF document text
    • http://yoptan.space/31039427386yz0fb.pdfIn PDF document text
    • http://moresukko.ru/77210196305bveoh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476590/normal_601fe415b0e9e.pdfIn PDF document text
    • http://cosmeteca.com/fepudenal84at.pdfIn PDF document text
    • http://brumbum2.xyz/dark_souls_3_dlc_price_xbox_onek95li.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444882/normal_5ff9923630d90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457312/normal_606d993536d84.pdfIn PDF document text
    • http://chambrehub.xyz/average_digital_marketing_manager_salary_uktpnyj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4a0f17ac-6ce6-4c05-9546-25c48d39d9f7.filesusr.com/ugd/cd79e3_ffabcfc46c014b2788df0a09f93718f1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd88c720-6271-490e-860f-f00aa252f1c6/28008236720.pdfIn PDF document text
    • https://6739ca04-605d-4ff4-b4c9-4e5bd75a7819.filesusr.com/ugd/031dda_5c60c19723d544f7b5100028a92edcf9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e27c9b6-92fe-4abe-8f5e-ce4821a48a0c/are_electric_oil_filled_space_heaters_safe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a6e061b-cc3b-4f0b-b56f-40b548b102c6/tidetabatilema.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ef090fb-9735-47cf-bc7a-05d0170b5b30/detepomumabodi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fecc3a3-9baa-4934-b5f7-706504ade9eb/3917521103.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002aa28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AA28 7492 bytes
SHA-256: 11a747c6f5ec7684ec645d3ed7faee6633e200123988da9332da29fa1a4d0100
font_01_sfnt_off0002c3d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C3D8 5816 bytes
SHA-256: 100b5f4ae1a816f32f56f9962727e7f08d2d14ad72cfba2c454cbc3df7f573c7
font_02_sfnt_off0002d778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D778 11656 bytes
SHA-256: 480f7f661c6a50d825303b71fd46a21c72b28e89c0211939b3551c7ba46d4fd0

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