Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8d49d118e6afdfd…

MALICIOUS

PDF

68.6 KB Created: 2020-11-13 00:56:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7742e73cc06fda2b7d8136a73555aa5 SHA-1: 18d29880edc53fe9b87f44b78fa343fd9d860878 SHA-256: c8d49d118e6afdfd35e01831b84af13fb8e77ad99faa72821ab59028bcbd2f27
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, appears to relate to a product advertisement, suggesting 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://trafftec.ru/123?utm_term=opticover+wireless+repeater
    • https://cdn-cms.f-static.net/uploads/4370780/normal_5f926cbacce42.pdf
    • https://cdn-cms.f-static.net/uploads/4384036/normal_5fa6c215a2c33.pdf
    • https://cdn-cms.f-static.net/uploads/4368952/normal_5f883d5fe92bc.pdf
    • https://cdn-cms.f-static.net/uploads/4411228/normal_5fadba84d0c23.pdf
    • https://cdn-cms.f-static.net/uploads/4372963/normal_5f933a24d4f53.pdf
    • https://cdn-cms.f-static.net/uploads/4379846/normal_5f8fe2798c534.pdf
    • https://cdn-cms.f-static.net/uploads/4378381/normal_5fa946e27841d.pdf
    • https://cdn-cms.f-static.net/uploads/4420600/normal_5f993ccbe0bfe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fezenur/alopecia_areata_difusa.pdf
    • https://uploads.strikinglycdn.com/files/39492697-7692-4890-a026-4b4b07046c9c/descargar_musica_gratis_para_iphone.pdf
    • https://s3.amazonaws.com/bojafazes/rgb_skin_color_range.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_off0000cf5a.bin
530f74ad5e18d73abf227308f0dee7e7bc5b6b1f1ed9d84d64431e354d60ec0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF5A 5108 bytes
font_01_sfnt_off0000e0db.bin
9cce54d9838c2d96ceec567feea927b20877f65f7eb89685f423f3714009da60		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DB 11012 bytes

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