Malicious PDF — malware analysis report

Static analysis result for SHA-256 e86b50ef4bc7e2c8…

MALICIOUS

PDF

76.5 KB Created: 2021-07-13 22:23:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a40a055a0e8f9ea54bc73655888e63a9 SHA-1: 8c8057c50b013bb53e239d1b514fc9389a207bb0 SHA-256: e86b50ef4bc7e2c827a09f6f7ad655077df49fda4405c00959db6c0f626c14cf
136 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains an embedded URL pointing to a suspicious domain and exhibits heuristics indicating a lure to execute commands via the clipboard. The document's content, though obfuscated, suggests an attempt to trick the user into running arbitrary code, likely leading to the download and execution of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7483

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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=pdf+ifilter+sharepoint+2013
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec9a259cb57f380a79a3c5/1626118693483/bowilo.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60edd6b1ad58ca03d2260fcc/1626199729919/muzimomimibudavupuza.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec91def6fc466b5bf45d98/1626116574620/wubawifosabosumokol.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7a75c872c4c6263c217f4/1625794396128/woxumoseluvosigewekekaw.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_off0000cb9a.bin
d045814aee3e6dca5ddb32d9d0af5cd4eb5d96822346de330118bcf5c9b11c72		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB9A 11064 bytes
font_01_sfnt_off0000e555.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE555 16792 bytes
font_02_sfnt_off0000fd67.bin
4e223d748f7e9af4af40d61bc1be8a3e236ffb093cc2c310edfcc641f90b0e3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD67 15896 bytes

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