Malicious PDF — malware analysis report

Static analysis result for SHA-256 bce951706ec3991c…

MALICIOUS

PDF

79.8 KB Created: 2021-07-14 09:06:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d13d7a55eb774a92659304df2c68d204 SHA-1: 438c678946f4517713ae49cdc89348aafd4c8519 SHA-256: bce951706ec3991cac7b6793532d84ad463698b4a52d08951eba96234085f492
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ClamAV as a phishing trojan. It contains an embedded URL pointing to 'nomylo.ru', which is likely used to redirect users to a malicious site. The PDF structure itself does not contain executable scripts, but the presence of the external URL and the ML classifier's output strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6166

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://nomylo.ru/square?utm_term=best+of+israel+vibration
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec82394027437375965aba/1626112569654/96850836618.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec87ff4a8bde38c345485e/1626114047429/6595582715.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8e116c22c005c93355c93/1625874710348/uyire_uyire_song_download_mp3.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e80642ed7e63043965d884/1625818690713/articles_of_co_partnership.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_off0000d842.bin
0ea2b7b92860f81d948e9a30d9ee635da6fd142d6dbcd828367ab9528cc97945		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD842 16580 bytes
font_01_sfnt_off00010389.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10389 16792 bytes
font_02_sfnt_off00011ba0.bin
90ab0fc4c7d20ee6fb8feb7e81bb05ff60d9a067c6ab5c5c6c1726741925fac5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA0 10464 bytes

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