PDF malware analysis — malicious · e3b67f75cbb678dd

MALICIOUS

PDF

9.4 KB

MD5: 732415bf3299dd082280f0c2f4d538b6 SHA-1: 883dd20577c73eb7c17ccf2148659f1e1171cafe SHA-256: e3b67f75cbb678dda4a88981c6c498a052cdd5f35afa4997875d2c9363893d30

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The sample is a PDF file that contains embedded JavaScript, which is a common technique for exploiting PDF reader vulnerabilities. The critical heuristic 'CVE_2007_5659: Collab.collectEmailInfo' indicates exploitation of CVE-2007-5659, a known vulnerability. The embedded JavaScript is likely designed to download and execute a second-stage payload, as suggested by the 'deobfuscated-js' artifacts and the ClamAV detection signature 'Pdf.Exploit.Agent-35905'. The document body was unreadable due to encoding.

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` `b447fa30b89c4ba2635c5cb6947a57cb5ba3a04d24aaf2b197e6efd57d6731ad`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	11976 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` `4b7a16b841273bcbcaa4c17866811bf9f626771ffa8348e4df429b58c80dd8b4`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	5028 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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