Malicious PDF — malware analysis report

Static analysis result for SHA-256 3096ac24ac4a5888…

MALICIOUS

PDF

57.3 KB Created: 2020-11-18 11:52:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fae1f9b8e1b80a2ef6cf74735d5ec4e8 SHA-1: 0346ffa01c1963d795af773933b9149fc85e3013 SHA-256: 3096ac24ac4a5888565a7baddd5f9cb22b729ab66fb5ecb12c0bba153392327e
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that leads to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though partially corrupted, suggests a lure related to an 'End of evangelion poster', likely intended to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=end+of+evangelion+poster
    • https://cdn-cms.f-static.net/uploads/4376101/normal_5f8c6d44ef8ed.pdf
    • https://cdn-cms.f-static.net/uploads/4382784/normal_5fa6992f49b6d.pdf
    • https://cdn-cms.f-static.net/uploads/4366980/normal_5fa44fcce438b.pdf
    • https://cdn-cms.f-static.net/uploads/4380881/normal_5fa469bf5c7f1.pdf
    • https://cdn-cms.f-static.net/uploads/4378175/normal_5faed996bd4df.pdf
    • https://cdn-cms.f-static.net/uploads/4485710/normal_5fb259eeb039c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f979e20a-480a-42f3-9108-8c1309f4b7a5/importancia_de_las_ciencias_geoambientales.pdf
    • https://uploads.strikinglycdn.com/files/531aeef5-6282-4a7d-9dc9-2f9dc08557d9/sumuvodaguban.pdf
    • https://uploads.strikinglycdn.com/files/992cd134-2ceb-490c-b55b-29c11ef2dc29/61672083996.pdf
    • https://s3.amazonaws.com/gezetega/telefono_departamento_de_la_familia_caguas.pdf
    • https://s3.amazonaws.com/jamokaroxoj/oral_presentation_skills_for_students.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_off0000a726.bin
8ee0625445858c8dcd1920b2c8f5a2a4a284b9e256749f94b79d5d18ae047752		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA726 5224 bytes
font_01_sfnt_off0000b90e.bin
ee5859085fb3821659f0224ff8ac402df25538ed5fdc9a17cb8bec55ddc448d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB90E 9332 bytes

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