PDF malware analysis — malicious · 82c9d5b4cbc58b8f

MALICIOUS

PDF

6.5 KB

MD5: bf02f27110da68ea0815a781353388d4 SHA-1: c1a576c0caf7c25357e3307db707212fdde298c2 SHA-256: 82c9d5b4cbc58b8f3a8f5911852c763116d60ac2457edda82300b633f8a0deff

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1559.001 Component Object Model T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, which is flagged as suspicious. Specifically, the 'CVE_2007_5659' heuristic indicates the use of the Collab.collectEmailInfo method, a known exploit vector for older PDF readers. The embedded JavaScript stream, identified as 'javascript_obj0006_000.js', is likely responsible for executing the exploit. The obfuscated nature of the JavaScript and the ClamAV detection further support its malicious intent.

Heuristics 6

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. (matched in decompressed stream)
ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `157293c35b9ed5d5aeb20cfbfa687dbe61d49b9173fe392fc7e0fed7a965cc0d`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1A5	5449 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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