Malicious PDF — malware analysis report

Static analysis result for SHA-256 7959a8e020e68ba8…

MALICIOUS

PDF

93.7 KB Created: 2021-07-17 14:09:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 667c545606331d54009bcf0fca91f960 SHA-1: 3d66e3a5f0d977b2844edac960ee9d7606d1bef6 SHA-256: 7959a8e020e68ba83f98927a858352835709459d8b159c0d05d94de6ba74ec8f
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of an advance-fee scam, presenting a lure related to lotteries or parcel delivery. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the exploitation of PDF vulnerabilities to deliver a payload. The embedded URLs, though mostly benign, are part of the document's structure and could be used in conjunction with other malicious elements.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5781

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/~3/4Ji06Fp1PxY/square?utm_term=ophiology+is+the+study+of
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7c52c86d8930991a534aa/1625802028769/redox_titration_problems_with_answers.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8c910eebddd6e48ed9d18/1625868560516/famutegire.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e9518012fb7d0b2794d68f/1625903488699/how_to_make_powerpoint_presentation_into.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f1be186d209c5724466992/1626455576301/what_colors_make_turquoise_green.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_off00010d2d.bin
a53cefccc1ca3cdb77e353af40214cc9c98d780e4686704ecb6b7c79da83d3c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2D 10652 bytes
font_01_sfnt_off0001258e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1258E 16792 bytes
font_02_sfnt_off00013da0.bin
64008c8c25bda05e8275957c62a6908740826bcc8338c7be1aa31522bdd56615		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13DA0 17336 bytes

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