Malicious PDF — malware analysis report

Static analysis result for SHA-256 8350491b650d3748…

MALICIOUS

PDF

65.8 KB Created: 2020-11-27 12:15:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 931bcca8c80d09cb441a630d3d5b2eaf SHA-1: f075a2ffe90007df20633661aa5878c553255595 SHA-256: 8350491b650d37488b69e7e82812ee6e8a18342b69efb513082755acadaf94e4
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://trafffe.ru/123?utm_term=ff14+tam+tara+guide', which is likely used for phishing or to download a secondary payload. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of external URLs strongly suggests a malicious purpose.

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://trafffe.ru/123?utm_term=ff14+tam+tara+guide PDF link annotation
    • https://jimedugevebuz.weebly.com/uploads/1/3/4/4/134437071/dupifesedun_meletul_wajibopa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393363/normal_5fa4bb0dc0733.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375525/normal_5f9b5d3b6627d.pdfIn PDF document text
    • https://fozegujulukov.weebly.com/uploads/1/3/4/4/134459046/5925681.pdfIn PDF document text
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/8098586.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392860/normal_5f92378501c9f.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/bdc79a9ff18576.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/d45183ab-e4d4-4947-8d36-ae66566f4798/83656598966.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2c68f08-d528-4055-ab27-38024d1c0368/55760793015.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_off0000c2e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2E2 5112 bytes
SHA-256: cfa01db40f7521c8157f6e17fa180bd00547bb306a72cd8587fe170706a4aa74
font_01_sfnt_off0000d441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD441 10920 bytes
SHA-256: 995b1ca6e0e36dbe290d116620b0a0bb3efb8c9964c8b0469b787d6b4cbfe1d7

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