PDF malware analysis — malicious · 2b87336ac84f0327

MALICIOUS

PDF

6.2 KB

MD5: 050e9071a705fb83303a9a2564ee9950 SHA-1: aa732ac710aa20d3459cd4d776a0606506f6a5f1 SHA-256: 2b87336ac84f0327262882cc49e5b8859dba213ad719f787419d2d2616152396

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2007_5659 heuristic firing suggests exploitation of a vulnerability related to Collab.collectEmailInfo. The unescape() call further points to obfuscated JavaScript, which is likely responsible for downloading and executing a secondary payload. The presence of an extracted JavaScript file (javascript_obj0006_000.js) reinforces this assessment.

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` `f23e741dc33d4dd6bc8aaa7875c7e8fdd744b3375036e044f512b59e738e5676`	pdf-javascript-stream	PDF /JS object 6 at offset 0x19F	5103 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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