Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e76e9b6d18c5a31…

MALICIOUS

PDF

77.8 KB Created: 2021-07-14 07:58:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 312d69c6b75441277e837fb7c506dc31 SHA-1: 61a680e1feae3ad748fc20ae32f8c8937e21ec8a SHA-256: 9e76e9b6d18c5a31cf57899ae4b1e439aaf32879539bce6dc6c02ff296a0c92f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing attempt. The PDF contains an embedded URI that points to a suspicious URL, likely intended to redirect the user to a malicious site. No scripts were extracted, but the presence of an embedded URI suggests an attempt to deliver a payload or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7746

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/iCUEKX862tE/square?utm_term=the+human+menstrual+cycle+lab+31+answers
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e922afb68d8f0f4bf851e8/1625891503491/sodabur.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ecabec9a1cf201f808db66/1626123244399/printable_maths_puzzles.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee291d6bb0602df2103807/1626220830044/bacteria_and_fungi_are_known_as.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec71a2950202184f0ec361/1626108322772/a_to_z_tracing_worksheet.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_off0000ce5c.bin
790d670e2f2f6aabe2e20848edf0051b2dea2440f83853c94be3877af988bb2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE5C 16732 bytes
font_01_sfnt_off0000fa19.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA19 16792 bytes
font_02_sfnt_off00011230.bin
f8f2260b4c47b36bee5c90be95bf5e3f4499e2357e649cd8ca6846a413aba99c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11230 10908 bytes

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