Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a03543fd4102dca…

MALICIOUS

PDF

70.2 KB Created: 2021-01-09 15:46:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 4f13d5f3421d417b9c9f6be489947fec SHA-1: 39c34749defda8b30afe0e98df76108bb59ee427 SHA-256: 9a03543fd4102dcad4ffb054e27c327a5c5f24cd0ea2b2fedefc006605d7c644
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'traffine.ru', suggesting a phishing or malware distribution attempt. The PDF structure itself appears to be malformed, with duplicate object bodies, which is a common tactic in obfuscating malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/123?utm_term=gamecube+emulator+apk+game PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401505/normal_5fad81fa9ea90.pdfIn PDF document text
    • https://cdn.sqhk.co/veleviziwew/ahf86To/weekends_only_hours_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380883/normal_5f942b9d413e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468843/normal_5fddd55471c0e.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/0944d83d-7f6e-42d2-b108-07e8838aa6ba/bokopujasenasixa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/865749ee-4834-4dac-80a2-396f2faa17d9/solution_manual_free_download_ebooks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e0ac994-5644-4a1c-8a8b-e3c21f461559/thomas_merton_contemplation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6bd6d3f-4094-4404-8b0a-805f5271a7e5/fofelegekowixesagufu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abf80b70-a3b1-4a55-9214-e68b185006dc/netavubo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96c166cd-82d9-437c-ad6e-255f637b9a4f/medical_surgical_nursing_9th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39e31d2d-b4bc-4dff-9736-465e0edb1b66/58196789638.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_off0000d375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD375 5308 bytes
SHA-256: d5603eecbce1c11b35f3e96c25ff4826f432833047197dd73694a9fdfa8c38ee
font_01_sfnt_off0000e578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE578 11676 bytes
SHA-256: 6bf31e4ce747d95f72cba851218cfb62ce899540946e0c86685909291dc6f111