PDF malware analysis — malicious · 7d5c370550a5a194

MALICIOUS

PDF

9.5 KB

MD5: d2aff22f225d9d5c39cf03b64ad13208 SHA-1: 469fad817f3dd52eaa0ead8c420cd7f0d7014957 SHA-256: 7d5c370550a5a194ec4f477323f4683f633bb0e31312762200ff5c97172e7ebd

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The critical heuristic firing for CVE-2007-5659 indicates the exploitation of a known vulnerability in PDF documents via the Collab.collectEmailInfo method. This method is used to launch embedded JavaScript. The presence of multiple extracted JavaScript files, some of which are deobfuscated, further supports this. The script's likely intent is to download and execute a second-stage payload, although the exact mechanism is obscured. The ClamAV detection of 'Pdf.Exploit.Agent-35905' confirms the malicious nature.

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` `5bd2ff1aaf0959de76e011a577e61c6d1df7e743ce50e78416e754ac4a4cf42f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	12189 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` `69e37f30d29fbcf249180222bb54bbab768eb793178742c77fd31ffa1ccf5fc9`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	5095 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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