Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b026f4c91cf7208…

MALICIOUS

PDF

74.5 KB Created: 2020-12-24 23:31:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 95ac5bb76398c965d99abe82e4576644 SHA-1: 969164f0250c6ff5b513e90a65177709a1fdfc49 SHA-256: 3b026f4c91cf72082e8fb7bc3b5fc8821b69aa3c2267e39bc3a215debaf76138
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The embedded URL 'https://trafffi.ru/123?utm_term=yellow+line+dc+metro+closure' suggests a phishing attempt, likely to redirect the user to a malicious site. The document body, though heavily obfuscated, contains text related to a 'Yellow line dc metro closure', reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://trafffi.ru/123?utm_term=yellow+line+dc+metro+closure PDF link annotation
    • https://cdn.sqhk.co/jigidokasaga/idMhbgi/64891182516.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495058/normal_5fb2d7edcceae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418192/normal_5faa4173d9d51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389599/normal_5f92e2890135b.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/21e1cca3-9a5e-4285-8087-dd77bb4fb587/mech_dowels_big_mech.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64f61b6d-fb7d-493d-9f94-3a8266687701/welevuzorafiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94d3fd8a-8487-4070-950b-72341f3243a1/xuwoxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1cca88f-11b5-4bd8-a989-5e40a2c8aa9b/31583317937.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ec7d9ba-810a-4672-a478-3a6c32f70e02/kexasi.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_off0000e4fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FD 4928 bytes
SHA-256: 09fcc97760bbe80b96eef2457dd150710c775815251a7b5b6e8205d8dafec8ef
font_01_sfnt_off0000f5c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C0 11764 bytes
SHA-256: 9910a2bc7d942f74a6587ef1da5d3407993898af3fa579ae9cfc304a626e253c

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