Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f608d5a6178851a…

MALICIOUS

PDF

71.2 KB Created: 2021-07-12 20:38:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9154a12f206ec91f3940e817484e0a4a SHA-1: 916c709c36af076613cafee66b8cdf4bfdd41043 SHA-256: 1f608d5a6178851a7f017b91d507026a7177b9e8e7f72766ae72e404f9ec6dad
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URL pointing to a suspicious domain, identified by ClamAV as a phishing/trojan. The ML classifier also flagged the PDF as malicious. While no scripts were directly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6030

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://coretry.ru/square?utm_term=match+with+meaning
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e781e08851f21328ab4e32/1625784800740/luc_besson_lucy.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec7dd5e64ce5371634428e/1626111445524/morusaxisalijepem.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e92730e51f1f218d6a3c75/1625892656381/dusky_skin_quotes.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e835aa1c6ee137fa14684f/1625830827174/sofizujemadawexusipugiwig.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_off0000b6ff.bin
b3307903f5407102b51e60b0adf5a5caf1ba63c633b1aa6f5a25e3eaa6b0c3d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB6FF 10320 bytes
font_01_sfnt_off0000ce25.bin
987f1facafabe7bea11d240bc61853e80d7699e8995c1965cd0de18d53c372e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE25 16624 bytes
font_02_sfnt_off0000f95e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF95E 16792 bytes

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