Malicious PDF — malware analysis report

Static analysis result for SHA-256 0328ef7bf79fdc0d…

MALICIOUS

PDF

68.4 KB Created: 2020-11-26 01:41:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9a61bc2ea64784b0927eda5ceaf0f38 SHA-1: 6b831d33f20c7978ab61a5c1580851d9185a574f SHA-256: 0328ef7bf79fdc0d2e2dcbccd2c92f74c4e90c025f646bafe9caec9a32649e4e
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, with one pointing to 'traffking.ru', suggesting a phishing or malicious redirection attempt. The PDF structure and embedded links indicate it's designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffking.ru/strik?utm_term=john+varvatos+artisan+pure+discontinued
    • https://cdn-cms.f-static.net/uploads/4412415/normal_5f9570a37f1c8.pdf
    • https://cdn-cms.f-static.net/uploads/4414695/normal_5fb2f54f1de99.pdf
    • https://lagafuxomip.weebly.com/uploads/1/3/4/3/134347440/85df4da43618f86.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8cfdd736-b111-46da-a770-6646bfebf0b3/sezudigere.pdf
    • https://uploads.strikinglycdn.com/files/b8057bff-1b12-4a86-a30a-b89b8cf3a550/xulojujefitudop.pdf
    • https://uploads.strikinglycdn.com/files/4719efae-bdd9-462d-b76a-e9c44595fe91/dave_grohl_drum_battle_nandi.pdf
    • https://uploads.strikinglycdn.com/files/f7486aea-53a2-4719-b17a-029c65c92df0/motorguide_r3_30_lb.pdf
    • https://uploads.strikinglycdn.com/files/13e6fd78-7663-4f26-a236-1b86ef8aeb8a/17780120777.pdf
    • https://uploads.strikinglycdn.com/files/bacf0ddb-2976-4961-b452-6d0501e599dd/10733550131.pdf
    • https://uploads.strikinglycdn.com/files/d2429f7d-435e-4fef-bcd2-9cb54f8806e1/76212920940.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_off0000cfa0.bin
7261a7ea5b6ac10a95304e41a24cf6ecd2d11bb616dbc9b9dd14890614519177
pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA0 5180 bytes
font_01_sfnt_off0000e13d.bin
c766066983347f051fb519d7a2d3a92a7afa5da2044be5aa83e5e23f96622997
pdf-font-stream PDF embedded font (sfnt) at offset 0xE13D 10504 bytes