PDF malware analysis — malicious · 836b33192dc970ba

MALICIOUS

PDF

9.5 KB

MD5: c147fa999924b89f86316148f012fc8b SHA-1: e792774ba22c794290da020fd9dacba19e84d8f3 SHA-256: 836b33192dc970bab18d32df0a7fc791b053a799d9a1c82d2d5a42908f56c75e

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability through the Collab.collectEmailInfo function. This exploit is designed to execute arbitrary code, as indicated by the ClamAV detection and the presence of multiple obfuscated JavaScript streams. The primary intent appears to be the execution of a malicious payload, likely downloaded from a remote source, although the specific payload and delivery mechanism are not fully detailed in the static analysis.

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. (identified after JavaScript deobfuscation)
ClamAV: Pdf.Exploit.Agent-35905 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35905
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `d8a6b4ad1abf04d0c4a4f89535cfb57f7312edef25c443f4e844c8ec9d0929dd`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	352 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `abbf628b56b46cee01fe55f62afcb042dc1071efcbafb2627dacf1839ca00c08`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	12087 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `e43183765cddcd93a6093bc72660c81cb296d5217288ddb3e3e641be257088e7`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	5112 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.