Malicious PDF — malware analysis report

Static analysis result for SHA-256 8396c8ed7e24b2db…

MALICIOUS

PDF

77.4 KB Created: 2021-07-15 12:03:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fa37632ac0fe825062286cfdfe33df71 SHA-1: 1fdefe99122bb5c262b7dd655d0a18a048a63a74 SHA-256: 8396c8ed7e24b2db611db6f8fc12032e1e960e30e2c90d65bc080fff55bdb50b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an embedded URL suggests an attempt to redirect the user to a potentially harmful site. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with phishing or malware delivery tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8972

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/CcIy6vlvkUk/square?utm_term=what+countries+made+up+the+triple+entente
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e848f977c56e0f704b161b/1625835769401/debutewu.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8c6e3dd5c0c1026eee613/1625868003887/8383162425.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8fb4de6a58043b68fef70/1625881421540/adventures_of_tintin_android_game.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee6ee3a005482cc1597d94/1626238691368/information_system_company_example.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec96941d0b39337552a088/1626117780901/javascript_date_from_iso_string.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eff8e5bae8d04216d55386/1626339557981/christ_the_messiah.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_off0000cdd3.bin
dc04ff64908f0688037fb3c4b14a29ee0d415a4d754303659e1d2d8cfeba1a2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD3 16740 bytes
font_01_sfnt_off0000f8a8.bin
b047018c21bcbdcc9ece3d0db540566287c7e93f3e3e398792e368a356171bbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A8 10872 bytes
font_02_sfnt_off0001119e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1119E 16792 bytes

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