PDF malware analysis — malicious · e88f1837b356564d

MALICIOUS

PDF

9.1 KB Created: 2008-12-03 13:57:41 UTC

MD5: af5ef75aee961da168e60f45cf44d111 SHA-1: 56a4e7b7232ce1d2d2c7a5865b0bdcf7209598c0 SHA-256: e88f1837b356564d059fd335b32dcec078e12af69fea1c54aec7bfcd4a752fc9

238 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript that leverages critical vulnerabilities CVE-2007-5659 (Collab.collectEmailInfo) and CVE-2008-2992 (util.printf). The presence of these exploit-related heuristics strongly suggests the document is designed to compromise the user's system by executing malicious code. The ClamAV detection further confirms its malicious nature, classifying it as a dropper.

Heuristics 7

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)
util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992

PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (matched in decompressed stream)
ClamAV: Pdf.Dropper.Agent-7318536-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7318536-0
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` `50cac6d48d8b01578da77ec1568be244df45e8542ee14721ea5b7d80b6f2bae5`	pdf-javascript-stream	PDF /JS object 6 at offset 0xC5	15994 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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