Malicious PDF — malware analysis report

Static analysis result for SHA-256 9378f67f9cffdb5b…

MALICIOUS

PDF

88.7 KB Created: 2021-07-13 00:24:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4fe20656ade8cb64e966f7ae2aa1b6c8 SHA-1: 1eefda6f43c838fe68961ea203856d2b26c412f7 SHA-256: 9378f67f9cffdb5be7cdc39f2e672c288f8b79eb845849d0f4faf004e6316711
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, with a critical detection score. It contains embedded URLs, suggesting a phishing attempt or a lure to download further malicious content. The PDF structure and embedded artifacts do not reveal specific scripting languages, but the presence of external URIs and the overall malicious verdict indicate a likely attempt to exploit users, potentially via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5959

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/~3/5Aj-mlxkUx8/square?utm_term=what+do+all+living+things+need+to+survive
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e88cf5d1459f5f651008e2/1625853174036/velocity_time_graph_for_increasing_acceleration.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8bc7137c4677c34612293/1625865329793/driver_license_place_in_indianola_mississippi.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e95114f107ff2467ea6f79/1625903380459/joxilewade.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8c2019ffc3426e8a43e94/1625866753758/xomexupi.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_off0000fc89.bin
6b50ebfbdd1554c7032dfa4b0c09571a746b0ce33864414e20fe85c91d11e323		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC89 10684 bytes
font_01_sfnt_off000114ce.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114CE 16792 bytes
font_02_sfnt_off00012ce0.bin
1cb43753796fe4449065a25457aaa9b7a87f2e41a57e33c47f39527a9dd70d7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE0 16180 bytes

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