Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d463d3c3157d6ad…

MALICIOUS

PDF

74.6 KB Created: 2021-07-13 23:02:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a99af79d6a32b6b799db3663a296ea34 SHA-1: 9296c06188193aa91748997a7a4025a8db662ce8 SHA-256: 0d463d3c3157d6ad954cf5359643cd7d0d8abae2d8d2f771b500476db3ca5c7e
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URI pointing to 'https://oniceh.ru/square?utm_term=duck+thigh+confit', which is flagged as suspicious. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the presence of an external URI in a PDF commonly indicates an attempt to redirect the user to a malicious site for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier clean score 0.2402

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://oniceh.ru/square?utm_term=duck+thigh+confit
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e94dc4787dde1a90af60a9/1625902532569/example_of_journal_club_presentation.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e924b7f229ba2ea8371b11/1625892023351/durexikugalapevezoduxevu.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_off0000c1ab.bin
7957843646a795e0c9e686690bb6ffb6ecc31467cb64dda9533c9afdc8472587		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1AB 17380 bytes
font_01_sfnt_off0000eed5.bin
bd0fe86b13e4d7f56f16dc54ad6be1209978e82bb9c83505835652851f04dfa8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEED5 10200 bytes
font_02_sfnt_off000105ad.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105AD 16792 bytes

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