PDF malware analysis — malicious · dc9ca54f64c94dd4

MALICIOUS

PDF

109.2 KB Authoring application: cairo 1.7.4 (http://cairographics.org

MD5: dbb503d3b1f82849a76e559e852d4df2 SHA-1: 50c7658ae421496e53bc95d6c658221967be9991 SHA-256: dc9ca54f64c94dd47be15f0c475b4d02193c70fab11ebdfc2cc1ca431176797b

244 Risk Score

Malware Insights

MITRE ATT&CK

T1059.003 Windows Command Shell T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF contains embedded JavaScript and a critical heuristic firing for PDF_LAUNCH_COMMAND indicates that Cmd.EXE is being launched with parameters that suggest execution of an embedded payload. The PDF_EMBEDDED_PE_PAYLOAD heuristic confirms a Windows executable is present within the PDF stream. The embedded executable is the primary payload, likely delivered via a spearphishing attachment.

Heuristics 8

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\\test.pdf" (cd "Desktop"' — references a known-dangerous executable (cmd, PowerShell, etc.).
Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND

Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
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
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 http://cairographics.org

Extracted artifacts 8

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0096_000.js` `b1a09f919e0f5d1c1d284849c9af93bae6fd1411634dfdc491e126f9cd327f3f`	pdf-javascript-stream	PDF /JS object 96 at offset 0x1B086	53 bytes
`stream_026_off000199e8.bin` `d99025bd25af8ab78d97269d81f00b8de749b5e7e7fd064c278b80d4d8e59e9b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x199E8	18144 bytes
`font_00_sfnt_off0000a47c.bin` `ffa975e444309aebf63087f3372274e1fd05a3b85a460f0c6a855bdc7113c769`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA47C	12956 bytes
`font_01_sfnt_off0000cf57.bin` `2851bc3374b9c02cc1131d2e60acd2be985d12500167557e434aea7b813ffea5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCF57	23504 bytes
`font_02_sfnt_off00011762.bin` `716a68784192bd9b2407ec84c2b43eea85b119a8f83097233f5b893eff7601f2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11762	16892 bytes
`font_03_sfnt_off00014d10.bin` `661b5ab8b79bed39fb077069230bed3c4fef1ec7b66f26711c6735d5964187ab`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14D10	10680 bytes
`font_04_sfnt_off00017024.bin` `774840a6a84af5d7c37f05ceef2629c139a9eca873339dd9e3b1226aa5487008`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17024	4488 bytes
`font_05_sfnt_off000181df.bin` `257507ce0ea20492f410111dbfa2e235e1ad6f7edab9fec531ae3412c661965e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x181DF	3820 bytes

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