Malicious PDF — malware analysis report

Static analysis result for SHA-256 f73e6893ba953c5a…

MALICIOUS

PDF

78.3 KB Created: 2021-07-18 07:32:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a690936be7a0efd6282efb01d16ee0da SHA-1: ba9f2c6d50618050e3aa62add8b08b8961d33bef SHA-256: f73e6893ba953c5ae88c61901b92a87fc34122bc95d45d6149cd218c5f9ed049
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ClamAV heuristic identified this PDF as 'Pdf.Phishing.Trojan', indicating a phishing or trojanized document. While the embedded URLs themselves are confirmed benign, the presence of an external URI heuristic suggests the document may attempt to redirect the user. No scripts were extracted, limiting the analysis of the specific payload delivery mechanism.

Machine Learning

  • Nyx PDF Classifier clean score 0.1454

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/sq/ugae/~3/RVI1sXQGPkU/square?utm_term=volume+of+a+dodecahedron
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f24bc14b68c137e69173dd/1626491841209/makaton_sign_for_sorry.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee6aad8feeeb055d9cf77e/1626237613406/jujiva.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_off0000cf8a.bin
2217408b06d08507295be049a350b2dba8ec20e39ebadd89e19cc4a44b2eeee2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF8A 10452 bytes
font_01_sfnt_off0000e706.bin
d6ef6e72a199e31795e99b77d30e7dd7081d84a3c3f487ce612638cf92140a06		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE706 17656 bytes
font_02_sfnt_off000115e1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115E1 16792 bytes

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