PDF / .TXT malware analysis — malicious · c24b961b7267443d

MALICIOUS

PDF / .TXT

13.0 KB

MD5: 29f4d02541f0e9f3b499261217a10428 SHA-1: 28d1e81e4355ef750e6366ce564b08de8cb58754 SHA-256: c24b961b7267443d44f29a0a361f61d0015b838cf3b38b2f31cbda8452e78396

78 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF sample contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. A critical heuristic, CVE_2007_5659, specifically indicates the use of the 'collab.collectEmailInfo' JavaScript function to exploit a known vulnerability. This function is used to concatenate information fields and evaluate the result, likely to download and execute a secondary payload. The presence of deobfuscated JavaScript files further supports this. The exact URLs or hashes of the second-stage payload were not directly extracted, leading to an 'unknown family' classification.

Heuristics 4

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)
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_obj0007_000.js` `bedd676af9bf2e3ca07f9e3a10d07bc561e9745801f30653ef176c0c1e7620a3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	336 bytes
`legacy_pdfkit_stage_000.js` `8f1ef02d038b3766f44dbb3e91eecdd2c26f8e9bbcb68e5c3eca99587d3a2707`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2EC	12082 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `3ecd5e7dbaac14abf9e9ade2b89336f28782e1c712b947da5579405faf89a634`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2EC	4992 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.