Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9be90bba3c51ad6…

MALICIOUS

PDF

82.0 KB Created: 2021-07-13 19:46:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 62fd5196ada2a0e84a848b2f31275ecc SHA-1: aa9013a5c004712544be8a55149ca3ee215d92ee SHA-256: b9be90bba3c51ad6fd64ee23a694d5160c065c34437764e6c6c1c2305e1d0ebd
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to redirect the user to malicious content. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and detection results point to a malicious PDF designed for distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8847

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/nCRFBnYrBHY/square?utm_term=all+article+pdf+download
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ed0f1d6be96a4ec4061482/1626148637638/to_all_the_boys_i_loved_before_always_and_forever_full_movie_online.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ed83a343ec04194fd90b94/1626178467570/example_of_hasty_generalization_fallacy_in_media.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e92c2792abcc18c4f66e02/1625893927536/bivugekeweku.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ecefec67dd777ebfbadd91/1626140652593/98699368626.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e949943ba7d954d54759dc/1625901460278/vexadeferubivaf.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec9333af807f1e1526b0a2/1626116916019/laurel_hill_state_park_trail_map.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e87ad970d8222d3e640b80/1625848537474/26634313995.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_off0000e092.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE092 16792 bytes
font_01_sfnt_off0000f8a4.bin
489bcfc75a9bb94d2d86890f729453fb06cc1a8052b427d74b533ce9a20ccffd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A4 16864 bytes
font_02_sfnt_off00012453.bin
3264e4ddfdb4df5eb1adcced573622f40c3ab7689f201d7c30f1fb5dc49099f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12453 10512 bytes

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