Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0953daa0f1cc5c3…

MALICIOUS

PDF

130.1 KB Created: 2021-04-09 10:21:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c633da428a1e821269ed5e1009e7783a SHA-1: 558645ddc67b19559e0499e2926a309e5be2014c SHA-256: b0953daa0f1cc5c32c56640418abe1793dd76211c5e0d76aee3445ff7c7c58e9
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, appears to contain keywords related to car problems, suggesting a lure to entice users to click the malicious link.

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://botokaw.ru/strik?utm_term=2004+chevrolet+malibu+problems
    • https://cdn-cms.f-static.net/uploads/4402951/normal_6044630cee610.pdf
    • https://cdn-cms.f-static.net/uploads/4368735/normal_601f675375729.pdf
    • https://static.s123-cdn-static.com/uploads/4416496/normal_5ffbb69a88204.pdf
    • https://cdn-cms.f-static.net/uploads/4446377/normal_5fdb2a0a8d03b.pdf
    • https://static.s123-cdn-static.com/uploads/4366304/normal_5ff9cc9b7e65f.pdf
    • https://static.s123-cdn-static.com/uploads/4458137/normal_5fde8ba0480a1.pdf
    • https://cdn.sqhk.co/zubejavaxuvu/ehigePn/free_throw_basket.pdf
    • http://nomenowunesazoz.scienceontheweb.net/victory_world_church_service_times.pdf
    • https://cdn.sqhk.co/dusawugivepo/jbvlpji/female_action_hero_name_generator.pdf
    • https://cdn-cms.f-static.net/uploads/4388163/normal_602a73f734dc1.pdf
    • https://static.s123-cdn-static.com/uploads/4489846/normal_5fe17e97f0171.pdf
    • http://fibiver.mygamesonline.org/16558575971.pdf
    • https://cdn-cms.f-static.net/uploads/4417422/normal_606b2827e60f5.pdf
    • https://cdn-cms.f-static.net/uploads/4383802/normal_602a56120214b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/33a6ed2e-19ba-4759-8ba9-2d971369fae0/80814049884.pdf
    • http://gowepuxajotezo.onlinewebshop.net/what_do_preschoolers_learn_in_school.pdf
    • http://dowuvoduwitovos.atwebpages.com/99270253053.pdf
    • https://uploads.strikinglycdn.com/files/27a8242d-873a-4cc8-b320-e9963fa20951/how_to_wish_1st_birthday_to_niece.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_off0001c3fb.bin
4e0bd7716f45de338c30b1dd97f2b683a5dd2bc69c2f8cc65ed767a2d0400f4f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1C3FB 5640 bytes
font_01_sfnt_off0001d702.bin
583fc11a635270ad3a41bc0dd933d43d6d77a5ee41a1ba7e20759e74a3eb5b6c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1D702 10628 bytes