PDF malware analysis — malicious · cf8af03d25dc9401

MALICIOUS

PDF

385.6 KB Created: 2012-05-10 22:18:44 +02:00 Authoring application: Microsoft® Word 2010

MD5: c0845766f6b9d0395e185e8e6c99e890 SHA-1: 70b0fd38007ed97d6bc72d79728c4ddce7d09c28 SHA-256: cf8af03d25dc94015d6cc8e98d95456e99e6fe57b1ddd5e0a163bdd6e7a479b6

410 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF file contains embedded JavaScript and a PE payload, and triggers a launch action for cmd.exe. This indicates an attempt to exploit a vulnerability, likely CVE-2010-1240, to execute arbitrary code. The embedded executable and the associated URL suggest the document is a lure to download and run a secondary malicious payload. The ClamAV detection further confirms its malicious nature.

Heuristics 13

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.
TrueType bitmap font + active content — CVE-2023-26369 related high CVE related PDF_CVE_2023_26369_RELATED

PDF embeds a TrueType font with bitmap tables (EBDT/sbix/CBDT) alongside exploit delivery indicators — CVE-2023-26369 exploits the sfac_GetSbitBitmap function in Adobe's libCoolType for arbitrary code execution. This CVE was actively exploited in the wild, but this rule does not validate the malformed EBLC/EBDT primitive.
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\\!Infected_PDF_File_WARNING!!!.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
Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION

PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
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
External URI info PDF_URI

PDF contains an external URL action
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser exited 1. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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://blog.snypter.com/2011/10/adobe-pdf-embedded-exe-exploit-for-xp-systems/

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0065_000.js` `55fd770131edfae6dad9cfc3bf2e6daf23ccc9be8bed99a6bfd99922e422c9ab`	pdf-javascript-stream	PDF /JS object 65 at offset 0x600D0	78 bytes
`stream_004_off000176d0.bin` `5c1d9757cab5cca7cc965b4f77b6c89ea1cf0f3961157e2d387840caf852e0a5`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x176D0	188552 bytes
`stream_009_off00055458.bin` `a1386d99ecca30ee93312680ff03c2c219cc3970c1b37209995ef7951fa8429c`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x55458	73802 bytes

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