Malicious PDF — malware analysis report

Static analysis result for SHA-256 f906ecd9aeabf12a…

MALICIOUS

PDF

75.2 KB Created: 2021-07-13 08:15:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 60899163a247c85f13f654a7aa733564 SHA-1: a163e0649280b0b97bd48040fcacd24e29a1a440 SHA-256: f906ecd9aeabf12a94c7cb015b0aa8d19d0e8c412411376c1b2369c67e93d317
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that contains embedded URLs, one of which is related to construction project scheduling. The ClamAV detection and ML classifier indicate maliciousness, likely related to phishing or malware distribution. No scripts were extracted, and the document body is heavily obfuscated, preventing a more detailed analysis of the payload or specific attack vector beyond a general phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7056

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://feedproxy.google.com/~r/razvivatel/yapz/~3/iXsW93xxTQA/square?utm_term=construction+project+scheduling+and+control+saleh+mubarak+pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e929188fb24157da7059cd/1625893145033/16667632417.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8772e8061cb7c4099733d/1625847599031/tafazazutisiketanojelizan.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed18144616123fc5f74148/1626150932236/sijaselew.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e849c76b562d162739784b/1625835975347/64306890784.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_off0000c202.bin
44bec9c3364ae8362035adb7f771cccc852dc65516291bd949b0843a4f50222c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC202 11560 bytes
font_01_sfnt_off0000dcce.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCE 16792 bytes
font_02_sfnt_off0000f4e0.bin
de990a36aa747e729ba3ff7899db7e970e299e1c5481e7004a5c53c050e8541c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E0 16764 bytes

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