Malicious PDF — malware analysis report

Static analysis result for SHA-256 a94d0e7355785a0d…

MALICIOUS

PDF

63.7 KB Created: 2020-11-22 22:11:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 14c2f2dae92e6d19235494b8a205df26 SHA-1: bbe88ec103217a01a8dbee72f82f5f0ad267c896 SHA-256: a94d0e7355785a0db79d6379310b0f8a14e1a8e000993642ee4c64ad45f5da94
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and a machine learning classifier assigned a high probability of maliciousness. It contains an embedded URI pointing to 'https://trafftec.ru/123?utm_term=muscle+factor+x', which is likely used for phishing or to download a secondary payload. No scripts were extracted, but the presence of the external URI strongly suggests a malicious intent to redirect the user.

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://trafftec.ru/123?utm_term=muscle+factor+x PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379987/normal_5fb2ad4d8a486.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459324/normal_5fa59765de33a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404124/normal_5f99f3290439d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412159/normal_5f9454b6af98d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369626/normal_5f91acbe97346.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/fca8893e-2e69-4999-ae8b-bc0ac993bb3a/gapewizurufezanupejafapon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33bfe522-a060-42d8-bcd9-81ef99074010/charlie_et_la_chocolaterie_roald_dahl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f9e5e13-d29b-437e-b71c-bd29f8bb2970/90953800063.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/dotanadegas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/997f5cbd-e24b-4e51-b777-7986c125a251/kolewalal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bba8a4b-a97d-4c90-844c-fb8e9fe631d3/29089663092.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96aafa6b-a4fc-4778-8bfb-ee29a4ac1684/30180038147.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_off0000c048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC048 4948 bytes
SHA-256: 97160a542caf76291d281e2879146f68d51a4b2de350016ea5ee3b5162150e4d
font_01_sfnt_off0000d13d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD13D 9812 bytes
SHA-256: 6dfadfed972bb8dd440b3e46154f04e59771ac82234b2a9e97bccd59c35d580d