Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca9fb9d999f1dfbb…

MALICIOUS

PDF

89.9 KB Created: 2021-07-13 21:45:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4abe251b9de1a010d9f904ee50bbe84b SHA-1: 2af59bf60f9de2829fec8bcdebdaccfd328c4ee4 SHA-256: ca9fb9d999f1dfbb3911f4f5a5847102b23b2c8853951749eba5579bc5d947fc
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains an embedded URL that points to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The presence of this URL suggests an attempt to redirect the user to a phishing or malware distribution site. No scripts were extracted, but the embedded URL is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier clean score 0.1792

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://cructi.ru/square?utm_term=the+meaning+of+deponent
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8ec5937da2614570b875c/1625877593681/50439094077.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e955f90a287971af9b8444/1625904634471/95733481136.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed93bd8c96c6301f96bbdd/1626182589206/76243928003.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0dc.bin
0fcca03908c6c83fe4ea67e21df35457f4443761c12e37d2e56bbace6f978bb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DC 17276 bytes
font_01_sfnt_off0000ea95.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA95 16792 bytes
font_02_sfnt_off000102a7.bin
e80a2d145f5b9acbed33c8208bdd001aaf656a595f63b807d65da7532f0a81c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102A7 20240 bytes
font_03_sfnt_off000137a6.bin
cfdde1832d954011d9cfe5ed6c57e0c3df12bd61c48fdc022cfe31529deb660c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x137A6 10592 bytes
font_04_sfnt_off00014f5d.bin
221589fa86170b0335a2c9aeace1a44c9dbce71787ed435be233d505c4b1e752		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14F5D 2284 bytes

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