PDF malware analysis — malicious · 327c9fb4ca326560

MALICIOUS

PDF

13.4 KB

MD5: 28fd8e879120b4b9dbe2160cb5ea4a48 SHA-1: 301966e36bdde53d2c76f9cc956a2b24659e3b84 SHA-256: 327c9fb4ca326560773e7ef2af08d424e3abddacd7a41a8b8421afe5aca52195

78 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, triggered by the CVE-2007-5659 vulnerability using the 'Collab.collectEmailInfo' function. This function is known to decode and execute JavaScript, which in turn likely downloads and executes a second-stage payload. The presence of multiple deobfuscated JavaScript files further supports this analysis. The document body is unreadable, so the rationale is based on the script execution.

Heuristics 4

Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659

PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (identified after JavaScript deobfuscation)
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.
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `bedd676af9bf2e3ca07f9e3a10d07bc561e9745801f30653ef176c0c1e7620a3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	336 bytes
`legacy_pdfkit_stage_000.js` `07128b6e32d5bdef62e19cf970ac457b3e5283067d958bb1ce0a7c484bf1b111`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2EC	12511 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `58b82d0a2666b2cc98d13d65a9efe47c24a3083139e14419b6cc844c483edd9e`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2EC	5225 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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