Malicious PDF — malware analysis report

Static analysis result for SHA-256 67864c03461d5299…

MALICIOUS

PDF

81.5 KB Created: 2021-07-18 09:31:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d150954b8affbe38486dd0f96bf796cd SHA-1: 455e054616c310c8bf0677a8ce7d6247c222bec9 SHA-256: 67864c03461d52995a9161e301b80c19d4717d450931ebbd82c70aa56e10de94
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. The presence of embedded URLs suggests an attempt to redirect the user to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to exploit user interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6166

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://feedproxy.google.com/~r/razvivatel/yapz/~3/gPkW7oTCsL0/square?utm_term=height+weight+chart+female+in+stones
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e90577db8bb141bad84ed1/1625884023931/62130562259.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f39f223a33e4096ddf96bc/1626578723099/74037264820.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8fb430a287971af9872e0/1625881411868/duzotafikavujofed.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee99a4e03b615e0992c3f4/1626249637109/daxupuvegux.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_off0000de14.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE14 16792 bytes
font_01_sfnt_off0000f62b.bin
d4f9cb0e1da364173b968e9bc894fa35271b9fe3d1ae1dea5b3da341ec8cfeee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF62B 10860 bytes
font_02_sfnt_off00010f1b.bin
7cf552742b87615ff2991da7edcb61cbdec5f7e144b801646b36f0a5326564dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1B 16556 bytes

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