PDF malware analysis — malicious · f38925017d1508eb

MALICIOUS

PDF

9.5 KB

MD5: 6e4e6b945ef77e08e06a580141e8b49c SHA-1: e3bfc6b703e9ae27ee473e527cd408be4e6aa40f SHA-256: f38925017d1508eb0927b010037e00f2a74f4ef192ff19c32c3117b18afe0a8d

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious Link

The file is a PDF containing embedded JavaScript, which is flagged by multiple heuristics including critical detections for CVE-2007-5659 and ClamAV's Pdf.Exploit.Agent-35905. The JavaScript is obfuscated and uses unescape() calls, indicating an attempt to hide malicious code. The primary attack vector appears to be the exploitation of CVE-2007-5659 via the Collab.collectEmailInfo method within the PDF structure, which then executes the deobfuscated JavaScript. The exact payload or final objective of the script could not be fully determined due to obfuscation, but the exploit itself is the main threat.

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` `8a5ba26b3b36c6b253cfff543fcb17386911ca9e029b9d882a21bd18f83b3a31`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	12046 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` `b38232fb5342effd43eb09c80e40cbc6a2850dcb54e2438c8601e27888e23b5f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	5085 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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