Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9bce878e3c21cd5…

MALICIOUS

PDF

70.8 KB Created: 2021-01-01 22:59:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 12fc12d9b4fed15295e74c862ea61218 SHA-1: 682b5cc04ea743e77d8bcdbc984613c26c9b6ea1 SHA-256: b9bce878e3c21cd5685212e497f6ba6da146098832e51a481d3e067012586a03
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 a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'trafffe.ru', which is likely used to deliver a malicious payload or conduct phishing. The document body, though heavily obfuscated, contains references to 'Naruto sandals name' and authoring information suggesting it's a lure.

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://trafffe.ru/123?utm_term=naruto+sandals+name PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369919/normal_5fad4bd1b311c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392462/normal_5fb36738a62c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491426/normal_5fedc50664410.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374682/normal_5f9aa2897bf6a.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/e44a4cb1-063c-425c-8055-0584e58920bc/36897377222.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/250cca62-f3bb-4dfe-a46e-3e9452eb382d/free_drift_trike_frame_plans.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/wings_of_fire_book_12_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f0f007e-9102-4c7f-b70d-67117dc7627a/64133047275.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a36b459-a512-4194-b5d2-a57cc77925b0/this_call_may_be_recorded_for_quality.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed08b7d4-6431-46eb-b45e-8a6bb4305cde/foladikojod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a62a6a6-2481-4d50-9726-070bf9e42dce/sugonaregazixomotekafuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43effe47-55db-4ca2-872a-ec0069705f0d/black_clover_quartet_knights_dlc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aa5cd26-c131-4ae3-8d03-fadc47f5106d/28075448151.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

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA48 4940 bytes
SHA-256: 2f21fd9e260dfd37892a88af4a3c96afd8397f9ccded1ef37f962dd044db1a64
font_01_sfnt_off0000eb00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB00 10420 bytes
SHA-256: b3457ccd6361821629518ba5e7627eb7944eab61c2b6986f93cbba6daea0f361

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