Malicious PDF — malware analysis report

Static analysis result for SHA-256 093339cedef3ad76…

MALICIOUS

PDF

74.4 KB Created: 2021-02-23 03:04:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f368f058bc537129e81f4d36c95c795d SHA-1: ae4a3438bddaa20d6d42644618612c789aac54d4 SHA-256: 093339cedef3ad76cc124673877cf7e4a39c2444bfbcfa55c5ddc8854578b70d
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://druttle.ru/123?utm_term=how+to+fix+a+broken+snark+tuner', which is likely part of a phishing or social engineering lure. The document body, though heavily obfuscated, suggests a pretextual document related to technical guidance, further supporting a phishing attack pattern.

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://druttle.ru/123?utm_term=how+to+fix+a+broken+snark+tuner PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481665/normal_60234a27b5ad4.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/jgOBNih/92646011261.pdfIn PDF document text
    • http://natorg.space/manual_code_reviewewowu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386829/normal_5fcfb1613dbfe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475219/normal_5fc5913c4df01.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469626/normal_5fe4b0e1b296e.pdfIn PDF document text
    • http://damita.fun/fikumulazevenipusunimuzimgohe0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482002/normal_603176799b9d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373520/normal_5fc8b3abe3e96.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477910/normal_5ff694944c384.pdfIn PDF document text
    • http://oneitshop.info/piano_notes_labeled_songsmbfn8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458635/normal_5ff3be46e9fb3.pdfIn PDF document text
    • http://antonioit.fun/ejercicios_de_rimas_para_cuarto_grado_primariazshqv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392651/normal_6006b7600ae41.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD817 4936 bytes
SHA-256: 5ad0194db65fd33578e769f1f72a06d99ae7bdd5f929ffb8c476c7f5ab1fbf23
font_01_sfnt_off0000e902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE902 11004 bytes
SHA-256: b7316e7ba9714ddc2a2a2abe63fc86a49ee6b4f85a0b60474db1c4c3f3b5a61a
font_02_sfnt_off00010e7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7C 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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