Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7215b449b614809…

MALICIOUS

PDF

78.4 KB Created: 2021-07-19 15:49:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 69168f81b57677011868af741f3db89f SHA-1: 22c314583d25d6280e1f13e66dac8e381dacafdc SHA-256: d7215b449b6148090ff153dfbd5dc2214a1f4178c541b3e70a2c7523d211a1ba
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing and trojan threat. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content is designed to trick users into installing malicious software disguised as a browser update or extension. While specific scripts were not extracted, the PDF structure and heuristics suggest an attempt to exploit user trust for malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/sq/ugae/~3/0YvHz_IItD0/square?utm_term=beginner+placement+test+english+pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60edcc9ee7c05a535254d170/1626197150300/90852596092.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee5c270b33b63bb8c7fce2/1626233896043/48670648266.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f333617f94c710fbc40c06/1626551137790/65815839619.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e94510085b1c120f994b26/1625900304531/movuxapilemod.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f4b4afdeec5816203f1a99/1626649775715/87692674394.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f421aa1ad9bf1c32bb9cbe/1626612138313/its_all_about_him.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f4f9750b17490892219bf4/1626667382116/situfomajukubixi.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e943e12210ba6bce1337b5/1625900001623/green_power_sources.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec9714973f9128ac6c97e8/1626117908832/rosiragazizikova.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f334224f27972c603f354e/1626551330743/burke_reflections_on_the_revolution_in_france.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7c72545e16b3be7e8a89b/1625802533699/rexukozojuvedibexopego.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_off0000d257.bin
ee1423124cf8d779c05a82ae6342e590c59352ef7c5520d740fc37be5d1872cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD257 11000 bytes
font_01_sfnt_off0000eb82.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB82 16792 bytes
font_02_sfnt_off00010394.bin
b83298687a4b1e4b35de1684ea054f2e7f57a4cfe6d6a6c945c09a369f5bc49f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10394 16244 bytes

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