Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7e27dd8e9df35c1…

MALICIOUS

PDF

75.1 KB Created: 2021-07-16 01:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ffd7785f70aef5414c778079459d2fcd SHA-1: 264c4b7e76a622e2e3ea097d022c77e44669699d SHA-256: b7e27dd8e9df35c1cc70866b26f90cc8462297d48713d997c088ab21ef82b634
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ClamAV with a signature indicating phishing and trojan activity. The presence of an external URI pointing to 'ketchas.ru' and a heuristic firing for a 'SE_DOWNLOAD_BUTTON' suggest a phishing lure designed to trick the user into downloading a malicious file. The document body is heavily obfuscated and unreadable, providing no further context.

Machine Learning

  • Nyx PDF Classifier clean score 0.2489

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ketchas.ru/square?utm_term=one+page+business+case+template+excel
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8df9af4fe78435a3713bb/1625874330036/fortnite_stretched_resolution.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edf364e7c05a5352592bb5/1626207077053/curing_the_yips.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_off0000c351.bin
db4c5840986cc011370978239a909f44572cab0ba7f29a2b216c2930c0c4a304		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC351 16968 bytes
font_01_sfnt_off0000efb1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB1 16792 bytes
font_02_sfnt_off000107c8.bin
f59e5e01ff1b918b25cc624ebfcf90cb1777f4dfa65e5afda4dc059558199687		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107C8 10864 bytes

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