Malicious PDF — malware analysis report

Static analysis result for SHA-256 90e5e8aa8d3b9522…

MALICIOUS

PDF

77.6 KB Created: 2021-07-12 20:36:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8b6560a0ea831c14972d765f2641ce81 SHA-1: 50cd0544fa1e5d0fda6df6333a7cac81e89f1370 SHA-256: 90e5e8aa8d3b9522a8571f8efed5850624adfab5703a15a2872d56805924f392
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL, disguised as a game download, is a common lure for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a potentially harmful external resource.

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/razvivatel/yapz/~3/-MXWpcYQ7kA/square?utm_term=counter+strike+unblocked+download
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec7b8add2ac847ff7dd3da/1626110858944/4667454447.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec73145978cb5ccaa925b8/1626108692932/best_video_editing_software_for_windows_7.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8bf079ffc3426e8a3fe6e/1625865991594/when_your_dog_barks_at_you.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8352d80504e0a776d6c8e/1625830701826/jadavodudakabozomewewava.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_off0000ced3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCED3 16792 bytes
font_01_sfnt_off0000e6ea.bin
bd92464cd5ca8ce2cbb616e554a1bcbc466fb937dfb4c9f40dc7e9e51e344eb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6EA 10812 bytes
font_02_sfnt_off00010017.bin
544b7a841d3bb6d03adc8b658e1562db54bbfcc324140ff1ed0619ff3ea88dd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10017 15916 bytes

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