Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e5c51d725de94e8…

MALICIOUS

PDF

79.4 KB Created: 2021-07-14 02:35:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c0b2d4462d7d5bd98dabf39020017c85 SHA-1: 88c7b79290351612d20a60ae294e241ccf4a47ca SHA-256: 4e5c51d725de94e8df51955ef75c5f2fb927f3616246b1222ec3731ffa3ef944
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The presence of embedded URLs, though many are marked benign, suggests an attempt to redirect the user to malicious content. The file's structure and detection as a trojan point towards exploitation for client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8374

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/sq/ugae/~3/-MXWpcYQ7kA/square?utm_term=gta+online+property+map
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e9477a309bd63f3d873174/1625900922602/26384221284.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edfa1d30d23a755066609f/1626208798096/80943712537.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e81d5d872c4c6263c76671/1625824605199/potential_transformer_connection_diagram.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec7c228300fd66e1958e1e/1626111010216/surreptitiously_meaning_in_tamil.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee0b142d09e34b729c4697/1626213140627/solving_e_to_the_power_of_x.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_off0000d82a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD82A 16792 bytes
font_01_sfnt_off0000f03c.bin
e89d0aa86f80aaf9edab2ca66cbe2ce26dbe71f8b2cc4648d5ae7851581898eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF03C 16232 bytes
font_02_sfnt_off00011a67.bin
93b926ff71ef53195cc7ca6c35f7fe14afcc0a127435bd3780e6b54f424012bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A67 10400 bytes

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