Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5b61d71752af7db…

MALICIOUS

PDF

100.0 KB Created: 2021-03-03 09:11:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29d851c5b46ca2931fc720316d9840b6 SHA-1: b85bc2444a41daf629f8e1f1a2585899548baf53 SHA-256: c5b61d71752af7dbf44deebf90f3eb7508d9483f450a4956d8efc26fc02662ac
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier. It contains an embedded URL pointing to 'golowaki.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to contain text related to 'safety dance lyrics glee' and authoring information, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/123?utm_term=safety+dance+lyrics+glee
    • https://cdn.sqhk.co/wadelovelo/nigSopy/super_bomberman_2_snes.pdf
    • https://cdn-cms.f-static.net/uploads/4426088/normal_600d6bd2d325f.pdf
    • https://static.s123-cdn-static.com/uploads/4373511/normal_5ffc3307a23f2.pdf
    • https://static.s123-cdn-static.com/uploads/4370555/normal_5ff2e3e0e20d3.pdf
    • https://cdn.sqhk.co/dutaxato/f7LBDa3/satisfying_slime_simulator.pdf
    • https://static.s123-cdn-static.com/uploads/4388842/normal_5fee62a2ed192.pdf
    • https://static.s123-cdn-static.com/uploads/4495402/normal_5fee8c42906a1.pdf
    • http://retapadu.medianewsonline.com/1900815174.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fuwawibu/26085711304.pdf
    • https://s3.amazonaws.com/dexodekelaseki/sizepej.pdf
    • https://s3.amazonaws.com/dudujopixejikug/roxejed.pdf
    • https://s3.amazonaws.com/zusevamasor/wodonezozufanipafexux.pdf
    • https://s3.amazonaws.com/fupanabivote/94163615256.pdf
    • http://livirava.atwebpages.com/nesaresizulozidegufepe.pdf
    • https://s3.amazonaws.com/napejaxosinages/vidmate_free_version.pdf
    • https://s3.amazonaws.com/saziwijaxodav/dojanexawowosa.pdf
    • http://rabatelekovufar.myartsonline.com/bissell_pet_pro_carpet_cleaner_directions.pdf
    • https://s3.amazonaws.com/wupixufekijax/kinijanogo.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_off0001484e.bin
8c24d72e517b0287bc81605de7db7405af6ed895bc9ea05b789f0e53952a7161		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1484E 5392 bytes
font_01_sfnt_off00015abe.bin
d2fc3ed57efe9041db0be026011111045168d2241c413aa1f571aae5c4af9ddc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15ABE 13000 bytes

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