Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed0a62ea61165ffe…

MALICIOUS

PDF

74.4 KB Created: 2021-07-13 17:23:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8cbcaa1a05639bd1fb4b8d4e9db1f3d9 SHA-1: db29cad1d631de441b61d26777870ac18e480317 SHA-256: ed0a62ea61165ffed897a64c1729c754aae8f316bb51c9f38f7d6f156cf3279e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL pointing to 'irlanc.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and the presence of an external URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7788

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://irlanc.ru/square?utm_term=crap+meaning+in+english
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ecd461688cba50b6748b8b/1626133601548/download_from_drive.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ed8234b8016c0d1ad76eb0/1626178100108/how_to_write_algorithm_in_latex.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ed5e7e1c817c33f6d5eae8/1626168958676/pokemon_sword_game_for_android.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_off0000c1e5.bin
d364070fb96fbb0b27ac8a0cdec73dcfbc63fb5196743e09a61bbdbc1104d289		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1E5 10512 bytes
font_01_sfnt_off0000d98a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD98A 16792 bytes
font_02_sfnt_off0000f19c.bin
320e066677dded0b981be619574fdfd712df00c42513bc80b0c65176ea611652		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF19C 17668 bytes

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