Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffba7f5f8e39f851…

MALICIOUS

PDF

80.5 KB Created: 2021-07-21 01:34:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 948798cef470e4d74e4976f4507b985f SHA-1: 642e9e5075ace9020331cb3fda07e314374ad5e0 SHA-256: ffba7f5f8e39f8510232dc9a747547c674e1af8b444267ee8d30f5f4b61d4f5f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged it as malicious. The document body is heavily obfuscated, but the presence of a malicious URL suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8298

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://laborke.ru/square?utm_term=currency+sgd+to+idr
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8ec84309bd63f3d838f69/1625877636528/what_is_a_central_angle.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ede8a09779423221e1090d/1626204320689/cheat_for_minecraft_pocket_edition.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f5f712c8ddd873bb233dc5/1626732306591/25571985213.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec8198fd54eb070825ab54/1626112408926/holy_priest_build_classic_wow.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e942af025aa46e30d3e821/1625899695643/74016693795.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de45.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE45 16792 bytes
font_01_sfnt_off0000f657.bin
a34cd0c36c0b2c495e0a4becff9601a5b6710cd9eddb27729a2a5cd5732d83a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF657 15468 bytes
font_02_sfnt_off00011e3e.bin
6a3723a396e85e815a7f62b091d3960a4fe0abb6dbb841405355dfaab9d11815		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E3E 10580 bytes

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