Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b5dd4af8c6d6b02…

MALICIOUS

PDF

66.2 KB Created: 2020-11-26 10:27:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ff2ce782f7fe11d3d649b288e2d3b83 SHA-1: 19e2dab4be64594dce01740a65ccaa80904789bb SHA-256: 1b5dd4af8c6d6b02fb55d46ad860690bb428c8e8195ddd5dbfaaae8385030859
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that is presented as a search result for a specific query, likely to trick the user into clicking it. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. No scripts were extracted, but the presence of an external URI and the high confidence score suggest it's designed to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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=lehigh+county+prison+phone+number
    • https://cdn-cms.f-static.net/uploads/4409403/normal_5fae414792fb1.pdf
    • https://woxawilafuzuve.weebly.com/uploads/1/3/4/6/134669094/kesonikisopel_wixaxidatewikox.pdf
    • https://cdn-cms.f-static.net/uploads/4369318/normal_5fba692db73df.pdf
    • https://cdn-cms.f-static.net/uploads/4385228/normal_5f8d49a13e53b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0691707e-c454-47be-8350-237292d21742/aoc_e2752she_manual.pdf
    • https://uploads.strikinglycdn.com/files/4fa29a2b-fd14-4352-864a-235edadd02de/418222550.pdf
    • https://s3.amazonaws.com/gebukil/bhagavad_gita_chapter_10_in_hindi.pdf
    • https://s3.amazonaws.com/nagev/stickman_2_unblocked.pdf
    • https://s3.amazonaws.com/gizonukorad/honeywell_visionpro_with_redlink_installation_manual.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4d8.bin
15410be7ad14e6075cf631fe39ae0c49077ea007baf9c1496a38a97fda3dbb81		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4D8 5288 bytes
font_01_sfnt_off0000d6c6.bin
32c8b2d1ba849bfb20a0ef6e6583915d6df2cfd15057a8f03d2abc49d4ddcd19		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C6 10984 bytes

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