Malicious PDF — malware analysis report

Static analysis result for SHA-256 a396e3f23cfcf2ec…

MALICIOUS

PDF

72.7 KB Created: 2021-07-20 21:49:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2fa07072901a3396bd0b511d0af21e62 SHA-1: e3f242c5b37397e00b688c1ea3d0a63ae31b96f0 SHA-256: a396e3f23cfcf2ec38f166df7930fa82c6a5136fa42378be79d192aac033bfae
66 Risk Score

Malware Insights

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

The file was detected by ClamAV as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', indicating a phishing and trojan payload within a PDF. The presence of embedded URLs, though currently flagged as benign, suggests an attempt to redirect the user to malicious content. The PDF structure also shows signs of manipulation with duplicate object bodies.

Machine Learning

  • Nyx PDF Classifier clean score 0.1797

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/gOBB6uaVNRA/square?utm_term=through+meaning+in+tamil
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f10ff26e3a8560b3d1b612/1626410994819/5059057641.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8034646a8e17713e64825/1625817926881/how_to_upgrade_residential_buildings_in_simcity.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_off0000bda4.bin
4d85e06886f5fd0867dc765ffc7fce10248971f09cfac19d00cf9a7e51937b2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBDA4 16244 bytes
font_01_sfnt_off0000e7af.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AF 16792 bytes
font_02_sfnt_off0000ffc6.bin
27a7bcbce82ae0b55b50431b5a7fa5b34fa905f79a7b00d76803c1c3b330797b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC6 10448 bytes

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