Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d4a5c5c1aba54b8…

MALICIOUS

PDF

72.7 KB Created: 2021-03-17 06:11:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9abe4e06fc8aede1fc5c5f554a1cf03c SHA-1: 9614ab88197d93e9141e914e4cae510e55a6e418 SHA-256: 5d4a5c5c1aba54b809d0db6bf498fda8ddb333f42c065d6ace006a449a6b4912
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is a PDF document identified as malicious by ML classifiers and ClamAV, specifically flagged as Pdf.Phishing.Trojan. It contains an embedded URI pointing to 'https://golowaki.ru/wix?keyword=dodge+dakota+parts+manual', suggesting a phishing or malicious content delivery attempt. The document body is heavily obfuscated, but the presence of the URI and the ClamAV detection strongly indicate an exploit targeting PDF viewers to download further malicious content.

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://golowaki.ru/wix?keyword=dodge+dakota+parts+manual
    • https://static.s123-cdn-static.com/uploads/4383304/normal_5fceb55db90a9.pdf
    • https://static.s123-cdn-static.com/uploads/4367914/normal_5fee827ac6f6a.pdf
    • https://cdn.sqhk.co/daborofus/hhfT7Yo/arcade_hoops_game_nyt_crossword.pdf
    • https://gefawopunov.weebly.com/uploads/1/3/0/9/130969454/papokunakapimapuj.pdf
    • https://cdn-cms.f-static.net/uploads/4372377/normal_60468c7173f92.pdf
    • https://cdn.sqhk.co/buwaxaxodi/jgcjajj/50153454517.pdf
    • https://mibofadap.weebly.com/uploads/1/3/1/6/131637701/6477943.pdf
    • https://cdn-cms.f-static.net/uploads/4501479/normal_604afaf487ddd.pdf
    • http://jotijitod.66ghz.com/idsa_guidelines_candida_auris.pdf
    • https://katesagi.weebly.com/uploads/1/3/4/8/134864962/71aa117.pdf
    • https://cdn-cms.f-static.net/uploads/4386333/normal_5fe853753ea5c.pdf
    • https://dodewugorar.weebly.com/uploads/1/3/4/6/134686454/6162655.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fujatelet.epizy.com/24688559974.pdf
    • https://4cd5a77a-be8d-44ba-8952-4177873115c4.filesusr.com/ugd/930050_a68d43e2b85448a4bf0350e2430d4e93.pdf?index=true
    • http://vafodesige.epizy.com/41497862951.pdf
    • https://uploads.strikinglycdn.com/files/784d7dc1-2aa1-4ded-82a4-b2f9f8e23299/grammar_for_middle_school_a_sentence-composing_approach.pdf
    • https://uploads.strikinglycdn.com/files/d989ecdd-8c63-45eb-8c2a-714c5d0f96fa/fumejofutegedepisotewer.pdf
    • https://uploads.strikinglycdn.com/files/c6d2a675-21f3-42f5-8f27-52e4883d7bfa/duvugotenipojeduto.pdf
    • http://jebafokar.rf.gd/dupurikituzimazawimagisu.pdf
    • http://mexesumofiruvaf.rf.gd/tazuzazagodufi.pdf
    • https://68f06c25-eb64-4e0a-94e3-a0e33e610147.filesusr.com/ugd/463ace_4f531c22602740459a638bc4e8fad7f7.pdf?index=true
    • https://c01188fd-d8af-4b86-846b-090f7ecd58d8.filesusr.com/ugd/9058e5_3bf8f957688d4c048e01718762079a02.pdf?index=true
    • 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_off0000e03e.bin
2d46da2363ed620ca815e52149434a805c5b83010ca5cfeda3da8bf3b7ef1b5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE03E 5340 bytes
font_01_sfnt_off0000f25f.bin
e763475cf6c4c2cc10174672d02bd524fc588083cdcfc94fc096dc241af83439		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF25F 10340 bytes

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