Malicious PDF — malware analysis report

Static analysis result for SHA-256 8405e413c664c6fa…

MALICIOUS

PDF

77.4 KB Created: 2021-07-16 08:52:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4451530bb8ab5fdc3f85c2ec276da597 SHA-1: f2b91976b21d693ef66005831a9d3124a87ac52f SHA-256: 8405e413c664c6fa19a03ccb770d9656e9378802731b27058f74c4c977d15c1e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF_URI heuristic identified an embedded URL, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the presence of embedded URLs within a PDF often implies an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7056

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/ZV5PD9BTPXI/square?utm_term=thinking+exercises+for+brain
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e81553a3609a707bae75a3/1625822547415/o_willow_waly_the_haunting_of_bly_manor.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60edf8259779423221e2ae87/1626208293298/betopofigubinod.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f07750be92cf3515347609/1626371920149/how_to_win_a_cosmic_war.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f0abcf60adbd7a5d9b00e7/1626385359881/74389700152.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_off0000cc9e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC9E 16792 bytes
font_01_sfnt_off0000e4b0.bin
0b9d23dfeb2211975a921d062cab3d181110d53f627d8d349c28904ceecffcb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B0 16568 bytes
font_02_sfnt_off00010f9d.bin
ccb3c3483e5f231986e9d8ac4d9b179be27b1b04fa368fa71fcfaeb25163d2f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F9D 10768 bytes

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