Malicious PDF — malware analysis report

Static analysis result for SHA-256 61bf35ad0d75b209…

MALICIOUS

PDF

65.6 KB Created: 2020-12-26 20:19:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d831dc11eb59e7acf43c08c20e10acfc SHA-1: b7ab80f9703e6cd74ef6869f3af8485c2570beef SHA-256: 61bf35ad0d75b20963dbb616b22f65a97d9c0c4b25825537f1f9718847d61fdd
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically a URL associated with a download lure for a driving game. The ML classifier and ClamAV detection strongly indicate malicious intent. The document's structure and embedded URLs suggest it is part of a phishing campaign designed to trick users into downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ggtraff.ru/wb?keyword=telecharger%203d%20driving%20school%20gratuit%20pc%20complete In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385435/normal_5f8de0ac08b52.pdfIn PDF document text
    • https://cdn.sqhk.co/nerenina/jvjfgcl/dilanavana.pdfIn PDF document text
    • https://tetagusupawuwag.weebly.com/uploads/1/3/4/5/134586179/xaxumofibo.pdfIn PDF document text
    • https://cdn.sqhk.co/norifasil/ETjhicH/phoenix_airport_hotels.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401983/normal_5fcbdfca6c58d.pdfIn PDF document text
    • https://buranujepexu.weebly.com/uploads/1/3/4/3/134339299/turoxodera_geduli_ruburowet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366397/normal_5f8a786380ae6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464700/normal_5fce59391ad84.pdfIn PDF document text
    • https://zaxiradijewebox.weebly.com/uploads/1/3/4/8/134889682/9c9ed3f6006f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385216/normal_5f94d620be372.pdfIn PDF document text
    • https://wedarudojov.weebly.com/uploads/1/3/4/0/134012757/dixiferunifiwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370985/normal_5f897112303af.pdfIn PDF document text
    • https://renijavodis.weebly.com/uploads/1/3/4/7/134709946/mafilara.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466996/normal_5fb8308a906f2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/504b3c93-dafb-465d-bc0b-40df26127678/xegadi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2C9 5660 bytes
SHA-256: 76058cc0494e6c0caffde4a6ebd69274611d2d95f294f4c4f2ce52d68f84462a
font_01_sfnt_off0000d5e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E8 10600 bytes
SHA-256: 65ac9dc0a70932bbb8415b11036b2c470e115866b87b6ad213d377fb1a7f2e88