Malicious PDF — malware analysis report

Static analysis result for SHA-256 e384a8296de0a4c3…

MALICIOUS

PDF

83.5 KB Created: 2021-07-13 16:33:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 65d21089fafbccb98b3ab3afea1eccc3 SHA-1: 037471614d37aa05c3f8176f38aec2d0da529e8d SHA-256: e384a8296de0a4c3b68102e6aa5d44874c2a5c72ade1ba25f843f8bd6ec49597
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a phishing trojan by ClamAV. It contains embedded URLs that lead to benign external resources, but the overall structure and detection suggest a malicious intent to redirect users to potentially harmful sites. The presence of PDF-specific heuristics indicates it's a PDF document, likely used as a lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.1542

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/~3/7R6buoffwiA/square?utm_term=organic+chemistry+books+by+foreign+authors+pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8e1ed27127e68041263ea/1625874925591/whether_and_if_difference.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec7b62e94d7a30e0547b25/1626110818250/taxoxu.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_off0000e18e.bin
57d05e0f0abe727d51807d3c357e59439c524fb0f82adfacfeff421a65053251		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE18E 11492 bytes
font_01_sfnt_off0000fc41.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC41 16792 bytes
font_02_sfnt_off00011453.bin
a260b071cd74ef3ad13a712afe665a25da5964e2ca1c9d3a5d8051859d5b48c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11453 16720 bytes

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