PDF malware analysis — malicious · 56d8b06fc2499af8

MALICIOUS

PDF

6.9 KB

MD5: d38b0d65a2ce4176dfcf6f240bb1630e SHA-1: 061afa45fd5d9324c7706490de3c54a76056d192 SHA-256: 56d8b06fc2499af8416185a9a71134572cdc5b9a696511549518f1c92641ab9a

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. A critical finding is the exploitation of CVE-2007-5659 via the Collab.collectEmailInfo method, which is a known vulnerability for arbitrary JavaScript execution in older PDF readers. The embedded JavaScript file, 'javascript_obj0006_000.js', was extracted and likely contains code to download and execute a second-stage payload. The obfuscated nature of the JavaScript and the use of a known exploit suggest a malicious intent, though the specific family could not be determined.

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` `d05539566612dc17c8f577f031892819fd03a35349667624db26c182d5099354`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1A7	5833 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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