Malicious PDF — malware analysis report

Static analysis result for SHA-256 54714cbf34ca2311…

MALICIOUS

PDF

81.4 KB Created: 2021-07-13 09:03:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6f1bcbaf43bd334b1d7d613b5fdf4587 SHA-1: 8269b2255e7f66665022eee3c07bab10c7c70d81 SHA-256: 54714cbf34ca231140c61018a011c90a03e9cc7b38f29589a00a2c74da0b455b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The presence of an embedded URI pointing to a potentially malicious domain, coupled with the PDF structure, suggests an attempt to redirect the user to a harmful site. No scripts were extracted, but the PDF's nature implies it's designed to exploit vulnerabilities or trick users into visiting external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8666

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=is+rice+good+for+your+diet
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ed17e2493b43382089b5ce/1626150882617/16355221466.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e912952210ba6bce119102/1625887381998/and_i_guess.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec8c387b14134336dd4a73/1626115128347/nursing_behavioral_interview_questions_and_answers.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ecc5bb67465052541cd5cd/1626129851279/2345594272.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ed047edacdbe35d6250485/1626145918978/rilobovin.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7d1194aaab0286a8a31ff/1625805081724/public_policy_making_cycle.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8e02a8fb24157da6cafd2/1625874474742/tivirivojilovenonipulapoz.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_off0000da2d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2D 16792 bytes
font_01_sfnt_off0000f244.bin
de06e3eb866eeda81515dc281a5e73fb5eb16e1915b8203d7d4060248dfe7f17		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF244 10504 bytes
font_02_sfnt_off00010a25.bin
945d060989a561dc45f3018a806ae2c9d86b6c4a9d88c60a7a11da66d2568229		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A25 17500 bytes

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