PDF malware analysis — malicious · dfcd40b5142a9d3a

MALICIOUS

PDF

3.4 KB

MD5: 2e99b17880257eca3bfb3fabb43367f3 SHA-1: 6c533731656054e574bd659346f10409ae375265 SHA-256: dfcd40b5142a9d3aa0771843a18aa57ae0a960509367d68a0cff0704235762d8

298 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that utilizes `eval()` and `unescape()` functions, indicating obfuscation. Critical heuristics identify exploitation of CVE-2009-0927 (Collab.getIcon) and CVE-2007-5659 (Collab.collectEmailInfo), which are known PDF vulnerabilities. These vulnerabilities are likely leveraged to execute the embedded JavaScript, which in turn is expected to download and execute a secondary payload. The presence of deobfuscated JavaScript files further supports this analysis.

Heuristics 8

Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927

PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (identified after JavaScript deobfuscation)
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. (identified after JavaScript deobfuscation)
ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
Suspicious extracted artifact medium 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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0004_000.js` `b3177f8374c1723dc94abe7a73d2a8eb1de09302c80fec87df85a42276def01d`	pdf-javascript-stream	PDF /JS object 4 at offset 0x249	22572 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 3 long hex-escaped blob(s).
`numeric_charcode_stage_000.js` `e5e15e0c476b117fefefd170ee8d5102582964c0463b8bcc6540140c81426219`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x3F2	6551 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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