PDF malware analysis — malicious · 0f3410d4e3ce0726

MALICIOUS

PDF

2.2 KB Created: 2009-02-18 19:32:26 Authoring application: Adobe (via EditPlus)

MD5: 01ace875e122ad5f58b03ff1a1a67f8a SHA-1: 1d8096b0e21cc8f3c5e6acb157e88acda3ff67b3 SHA-256: 0f3410d4e3ce0726fc76ba5afb7a4c079628faa92ed2f7647a828c7d72607271

328 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains embedded JavaScript that leverages the Collab.collectEmailInfo function, which is associated with CVE-2007-5659. This exploit is designed to execute arbitrary code, likely to download and run a secondary payload. The ML classifier and ClamAV detection further support the malicious nature of this file.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 8

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.
PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
ClamAV: Win.Trojan.Agent-34667 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Agent-34667
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `2c71b38799e313b64995eec31eafb644a36b5df2247e140c62009953f1947f7f`	pdf-javascript-stream	PDF /JS object 6 at offset 0x136	1387 bytes
Detection ClamAV: Win.Trojan.Agent-34667 Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`javascript_obj0006_001.js` `1b28ac58ce17d7bba30ff4cb7bd95ee29706d3ac97fb2f2b4a1d161c65c06ad5`	pdf-javascript-stream	PDF /JS object 6 at offset 0x159	1890 bytes
Detection ClamAV: Win.Trojan.Agent-34667 Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`combined_document_js_000.js` `8407e845af7e821706c20ebdb20b605a8f74d5e12b542158aa7f3bf72363bd84`	deobfuscated-js	combined document JavaScript streams at offset 0x136	3278 bytes
Detection ClamAV: Win.Trojan.Agent-34667 Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).

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