Malicious PDF — malware analysis report

Static analysis result for SHA-256 da48067e065cc270…

MALICIOUS

PDF

76.4 KB Created: 2021-07-16 13:20:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0d9fff4b6db87e6287fe3c2a4992e98d SHA-1: 0a7a3fe905c6686275bb554380c84835885af551 SHA-256: da48067e065cc270660d87b43cadb4c50b0f13b1dfb313ceba1f382dce779ed9
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated maliciousness. An external URI pointing to 'https://catamma.ru/square?utm_term=claire+jeanne+roberte+colinet' was extracted, suggesting a phishing or malware distribution attempt. The document body was heavily obfuscated and unreadable, but the presence of the malicious URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7390

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://catamma.ru/square?utm_term=claire+jeanne+roberte+colinet
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e884b187b051427c55a018/1625851057990/7322816603.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e77d63ab214735a0878806/1625783651536/30406286571.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e93a24563c1506a8b6e470/1625897508886/56158497857.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7dd285eabb22f35dab867/1625808168474/it_is_negotiable.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_off0000c9a7.bin
e7a6cd160c6b892204475e941706cbdd299467f0c77924a129dcaf0a43aefe24		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A7 10356 bytes
font_01_sfnt_off0000e11c.bin
5c9303f96afe8003d34730d548fe25a8485229cf87150e4a70ae15565f448aef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE11C 17136 bytes
font_02_sfnt_off00010e1d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E1D 16792 bytes

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