PDF malware analysis — malicious · 48672f053a9965c4

MALICIOUS

PDF

345.4 KB Created: É4°¢uçl¦ñ977"Q²] Authoring application: îvéêËk¶Á9³lwVn[kA·TEk (via ÞkâûË»Þ!ú¨e`W'+Q¢R P7¤Íg7)

MD5: 063d93d0e4ea7c4d2cde2d98085163a3 SHA-1: dfa86dbc2ab29a94f6de6fc6dde809172e57f5dc SHA-256: 48672f053a9965c4a94442297e4d601909b651ee6402870765203d086659a1a8

366 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.003 Windows Command Shell T1105 Ingress Tool Transfer T1204 User Execution: Malicious File

The PDF contains embedded JavaScript and a critical heuristic firing for PDF_LAUNCH_COMMAND indicates that cmd.exe is executed with specific parameters. This execution chain, combined with the PDF_EMBEDDED_PE_PAYLOAD and CVE_2010_1240 findings, strongly suggests the file is designed to exploit a PDF reader vulnerability to launch a secondary executable payload. The embedded file name 'bio51.pdf' is also noted.

Heuristics 9

Adobe Reader Launch action command execution critical CVE exact CVE_2010_1240

PDF uses the Adobe Reader/Acrobat Launch action pattern associated with CVE-2010-1240: cmd.exe is invoked with attacker-controlled parameters, paired with an embedded/exported payload.
Launch action critical PDF_LAUNCH

PDF contains a /Launch action whose target is an executable, URL, or UNC path — can start an external application
Embedded Windows executable payload in PDF stream critical PDF_EMBEDDED_PE_PAYLOAD

PDF stream bytes contain an embedded Windows executable with a verified PE header. Exploit chains often hide droppers inside ordinary streams rather than standard /EmbeddedFile attachments.
/Launch action target: cmd.exe critical PDF_LAUNCH_COMMAND

PDF /Launch action specifies an executable target with parameters '/Q /C %HOMEDRIVE%&cd %HOMEPATH%&(if exist "Desktop\\bio51.pdf" (cd "Desktop"' — references a known-dangerous executable (cmd, PowerShell, etc.).
ClamAV: Pdf.Tool.Agent-1388586 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Tool.Agent-1388586
Encrypted PDF carries /JavaScript — payload hidden from static analysis high PDF_ENCRYPTED_WITH_JS

PDF declares /Encrypt and also references an executable trigger (/JavaScript). Document encryption hides the JavaScript body and stream contents from static scanners — combined with auto-execution indicators this is a known evasion pattern used to deliver weaponised JavaScript that the analyst cannot inspect without the decryption key.
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0027_000.js` `0e14f56ea28354933fe0bcf8fa9618eaf8c0b603659fa3a08d7144b28f40f900`	pdf-javascript-stream	PDF /JS object 27 at offset 0x5617F	54 bytes
`stream_000_off000033d8.bin` `20f7530727ff461de43af16a42d60f12cd5c79a808e8dbeb8ab98159bd325ece`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x33D8	776192 bytes

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