Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5e693dc46a250a3…

MALICIOUS

PDF

91.6 KB Created: 2021-07-16 03:33:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eb2ad9f9fe01cdeee5e2cf5b9f26b33f SHA-1: cd7c049b56c2d0f3c1e34a94d625b20fdce7ab2e SHA-256: c5e693dc46a250a39b0475b24349687d0541089087f43db9a4b2b07fb6c528b7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan. While the document body is heavily obfuscated and unreadable, the presence of embedded URLs and the ML classifier's output suggest malicious intent. The file likely attempts to lure the user into clicking on a link or downloading a payload, potentially disguised as a research presentation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5959

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/AG-UZpNbJGc/square?utm_term=research+presentation+example+pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e81d42f29cd6423db6f4ea/1625824578203/11679262392.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f01e25bba06d2f3419fcd4/1626349094195/back_your_heart.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e76afde5d5821bb0e7b71a/1625778942053/redhead_animated_character.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f0ab01582eb6057142ab5a/1626385153880/58155376190.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_off00010504.bin
34b2bc6ca6da95323c3dcbdf52be48a4d8c987184ffbecf2bf144071d069c94c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10504 16860 bytes
font_01_sfnt_off000130fc.bin
c4127b98a93c3b77e0afb307cb35c2ebe1ad026e8e925ee2ae54b0ad64e0305a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130FC 11032 bytes
font_02_sfnt_off00014a7b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14A7B 16792 bytes

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