Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed2795e4cc84e358…

MALICIOUS

PDF

75.0 KB Created: 2021-07-14 05:33:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bbf7f34175e226c60f627f030f2fa20f SHA-1: 72ccef91709eac1df2dcc653375ec0af88241686 SHA-256: ed2795e4cc84e358ef53744e143aeae576f64cfd9da87f9df637927c52cff0da
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ClamAV heuristic identified this PDF as 'Pdf.Phishing.Trojan'. The embedded URL points to a suspicious Google feedproxy link, which likely redirects to a phishing page. Although no scripts were directly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site for credential harvesting.

Machine Learning

  • Nyx PDF Classifier clean score 0.2489

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/um1bUVUAM38/square?utm_term=how+to+draw+herobrine+in+minecraft
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60eddcb8a50f6e33a323f6a4/1626201272170/febalexamimijatesuze.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec900adef1ca41d5fa0f69/1626116107266/10171780865.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_off0000c52d.bin
c866d328e75b8be13e8b08dc46659a939c351739e45df74524bfd2c6b4b3867c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC52D 16440 bytes
font_01_sfnt_off0000efda.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDA 16792 bytes
font_02_sfnt_off000107f1.bin
dd63b0f3fce474f431be031c639006e74dc620f0dc56971ffea61a352c0eb585		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107F1 10744 bytes

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