Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f48c9434330f55f…

MALICIOUS

PDF

76.9 KB Created: 2021-07-16 20:07:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f32aea19e1ef4df0fc044f3e69860df7 SHA-1: 383787083269f59481bf12f7b7cd682b6066dd23 SHA-256: 9f48c9434330f55f1ec8aefa1bda05cb4347cb823969f27287e90b83f5c77577
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by a ClamAV signature and an ML classifier, indicating a high likelihood of malicious intent. An external URI pointing to 'wastran.ru' was extracted, suggesting the document's purpose is to redirect users to a potentially harmful site. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs are common in phishing and malware delivery schemes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9680

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://wastran.ru/square?utm_term=toughened+glass+price+6mm
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee0ec31f51426150c9ad73/1626214083818/meaning_of_taproot.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e94091aa30721e65f01ac5/1625899153802/fusitegotuxutorofexijova.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec8df145711547b6a6f5ea/1626115570031/xiwudalaborapitupixagipe.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f08a9c02a22d3aacf7caf7/1626376860627/kevuxebasenaje.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8efccf107ff2467e6c180/1625878476899/61542181986.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee33a0f6c772366d2d66c4/1626223520340/89249322768.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec863f59713006cbe1c510/1626113599538/dukejesegujatop.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8a1df0f4fe1319d1515d2/1625858527775/tafanejun.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_off0000c9c6.bin
21dfb11301112b5454baff3f77a5c96265bb16d54dcb8f23bd6dc3e36658c122		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C6 11092 bytes
font_01_sfnt_off0000e331.bin
af08b3cf81f877c6f0a5fd0f4b75d1c7b64caf6d6d0bd02f26bdbfcedf5e20e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE331 16988 bytes
font_02_sfnt_off00010fb9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB9 16792 bytes

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