PDF malware analysis — malicious · 1b0bdd6c31abaf3c

MALICIOUS

PDF

6.4 KB

MD5: 54b7700d2274fd7cd3939335af879c6e SHA-1: a4eb1dcef02aec225aff4a7cb1a450fc9694c05f SHA-256: 1b0bdd6c31abaf3cc315325d6ee271e76b15e7b115798159bb2388ed072e7a15

216 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File T1071.001 Web Protocols

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. A critical finding is the CVE-2007-5659 exploit (Collab.collectEmailInfo), which is known to be used for arbitrary code execution. The embedded JavaScript file, 'javascript_obj0006_000.js', is highly suspicious and likely responsible for downloading and executing a second-stage payload. The presence of obfuscated JavaScript and the use of a known PDF exploit strongly suggest a 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)
Suspicious extracted artifact high 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.
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `94f798137df7d7e33151e16b6f7cddf7686cd29a1d02ecb7ba92a27dd0727d12`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1AF	5371 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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