Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cd678c5938bf7c9…

MALICIOUS

PDF

88.3 KB Created: 2021-07-14 00:49:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 271443101ae8ce49da6b8ae3b6078d65 SHA-1: bbce2e12dae6880e6e7c650137c5f4ef82eca951 SHA-256: 9cd678c5938bf7c93fa0bcaab79d200c18b10035e781b1ad0b10a74e3fec3930
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded URLs, one of which is flagged as potentially malicious, suggesting a phishing or credential harvesting attempt. No scripts were extracted, but the presence of embedded URLs and the overall detection profile point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8172

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/v-xubMviL4Y/square?utm_term=cold+strip+mill
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee0361e11d817478d6129a/1626211169107/51891146414.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8a000082d905bfad8f80f/1625858048963/what_does_etc_stand_for.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edac10dfc7900eec33c941/1626188817050/bafiwixozupug.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e94aaef229ba2ea8383941/1625901743032/business_license.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e90218f229ba2ea835d810/1625883160852/44084734646.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_off0000f88f.bin
6309a87bdf097ac64db1617efc13c74905f2613e29f52feee33b3c7d603aa907		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF88F 10188 bytes
font_01_sfnt_off00010f4d.bin
2f31ed00f0ecf328fb18beeb5744c0664ebee50de50dcf61082ddcf9043de8f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F4D 17004 bytes
font_02_sfnt_off00013c0f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C0F 16792 bytes

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