Malicious PDF — malware analysis report

Static analysis result for SHA-256 0835bc40427b01af…

MALICIOUS

PDF

98.7 KB Created: 2021-07-13 13:18:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 06a3c7bd10f6c97fd349e5156eaa1008 SHA-1: 25e8a4452cf0b222eca346fd306eaf9a71c9d2af SHA-256: 0835bc40427b01af7943f41beb445e39e2b9f9a0d940e6436dd62fc1baedbfe7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ClamAV detection and ML classifier strongly indicate maliciousness. The PDF contains embedded URLs, one of which is flagged as potentially malicious, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with common phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5518

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/NsX9ihectO0/square?utm_term=angular+material+components
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e9253d83ae0c4902393c25/1625892158143/the_chronicles_of_narnia_book.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ed2ba567dd777ebfbe7620/1626155941283/10232850195.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed5e033489b768f16fde59/1626168835675/pharmacology_and_toxicology_book_download.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e76f1d0439116319b20c0e/1625779997797/6.5_g_cotton_rip_stop.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_off00011edb.bin
d271fe3b730a9aee983eab3f1484c6712a34562bc3c8da5009dc55acd428c0d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EDB 17752 bytes
font_01_sfnt_off00014dee.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14DEE 16792 bytes
font_02_sfnt_off00016605.bin
01e01bdffd91e71e37c9f18db66bedeb5cd28f8ecab2ad725e716ac8bb37140b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16605 10796 bytes

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