Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d95f91cd1ef45b4…

MALICIOUS

PDF

80.8 KB Created: 2021-03-23 06:59:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19874f1ba4dd97a7966df04849a4d83e SHA-1: ec8af2a094acdce4011c2a9d82264592b56e3923 SHA-256: 4d95f91cd1ef45b4d9f2771571fa0c4f9d1f1bbb735f4a60d97b7ceb915ae8b3
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains embedded URLs pointing to suspicious domains, including one that appears to be a lure related to 'Schwinn 430 elliptical measurements'. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://resalured.ru/strik?utm_term=schwinn+430+elliptical+measurements
    • http://jamotovoxut.mywebcommunity.org/57302931048.pdf
    • https://cdn-cms.f-static.net/uploads/4422382/normal_605812c11fac9.pdf
    • http://zakewabo.scienceontheweb.net/which_is_not_a_conflict_resolution_skills.pdf
    • https://cdn-cms.f-static.net/uploads/4446380/normal_601ec8ef0d737.pdf
    • https://cdn-cms.f-static.net/uploads/4500665/normal_6046e4ecdd621.pdf
    • http://nofubajabuv.medianewsonline.com/nutenudonibakopodiwus.pdf
    • http://bejawutipage.mywebcommunity.org/catia_caa_tutorial.pdf
    • https://static.s123-cdn-static.com/uploads/4383687/normal_6009a60618f5e.pdf
    • http://kudusakepupa.sportsontheweb.net/sdgs_indonesia_adalah.pdf
    • https://cdn-cms.f-static.net/uploads/4476593/normal_603bac0dd977f.pdf
    • http://zisuroto.mygamesonline.org/free_download_driver_printer_hp_laserjet_p1006_for_windows_10.pdf
    • http://xasowokudat.medianewsonline.com/36804985059.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://famekuputoda.myartsonline.com/12413170297.pdf
    • http://sefokirof.onlinewebshop.net/lesapipikumizazuji.pdf
    • https://uploads.strikinglycdn.com/files/a88b583d-e046-4337-927d-243e08c9f02d/36912976035.pdf
    • https://uploads.strikinglycdn.com/files/da198372-3717-43b0-8ec3-9367be2c40b7/how_to_do_mind_maps_for_studying.pdf
    • https://uploads.strikinglycdn.com/files/62fc85ed-ac5f-4c74-9b0b-e4e63bb89020/nijuzuwasonizuko.pdf
    • https://uploads.strikinglycdn.com/files/68ee8285-be65-4107-b73b-09537686d3a7/29296568772.pdf
    • https://uploads.strikinglycdn.com/files/eae935d9-8fd1-4265-abb0-c2b10d2cd88e/lewoporikanam.pdf
    • https://uploads.strikinglycdn.com/files/f3314667-98d5-4e31-82bb-5f3582bc959a/muvixesaxipozezadek.pdf
    • http://xutenasejubibe.atwebpages.com/lagajewusepesaz.pdf
    • https://uploads.strikinglycdn.com/files/5767dcc8-2f8b-4930-8f63-c7d6a8b6c07c/richland_borough_zoning_map.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0ae.bin
54d53b0788a026299a0462d7b1527892de0421687ef748d4298f5fdc74f83df7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AE 5536 bytes
font_01_sfnt_off0001034e.bin
55a20cc0b670d3f57de1d1e8bfeded5deff6143ecd3218cb96feb74786f320ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1034E 10704 bytes
font_02_sfnt_off000127b3.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127B3 4324 bytes

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