Malicious PDF — malware analysis report

Static analysis result for SHA-256 520ed6e351303722…

MALICIOUS

PDF

83.2 KB Created: 2021-07-13 12:27:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 321eb930feea719f3816c3216adae869 SHA-1: a87a650c231a6dee894677dd3d8b9199502c4e10 SHA-256: 520ed6e3513037228b18d88eea0b3e6e92378ec924f33c446c4b186e4e164a0d
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains embedded URLs that point to external resources, suggesting a phishing or redirection attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious intent, likely to lure users to a compromised site.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3485

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/gPkW7oTCsL0/square?utm_term=colloquial+term+of+endearment
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e78caf25441e1b378145f0/1625787567440/wilozoniratugefaxoxubo.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec806c7e5cd11affccd2e0/1626112108550/68019125421.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e965595ebba154a8fe5f0c/1625908569634/63083734144.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ecd37527ce5047d00fe011/1626133366177/principles_of_information_security_5th_edition.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c75c.bin
f057848972f5bea62ffd78896a913367e64ea223f5f442d7652691378c45f272		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC75C 18684 bytes
font_01_sfnt_off0000f78e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF78E 16792 bytes
font_02_sfnt_off00010fa5.bin
b5f2fe45ed7b7e81976a05bcb0fef8ecb708905c5427a5fd05456843876feecf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA5 10624 bytes
font_03_sfnt_off000127b0.bin
c44bbcf1906dfa586087d1b86b8dedc5b060b75fd2972581759effa061c40c84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127B0 16552 bytes

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