PDF malware analysis — malicious · ed48b0b87cd606d5

MALICIOUS

PDF

9.3 KB

MD5: e8ca6463f8c7b4403c7eb35f8af2b930 SHA-1: 05ea0bfe4a7f38ef4e827de9380e22584c5c862c SHA-256: ed48b0b87cd606d5bfa09b2b5e109c14250767967bef4d5f92552257fb9e11d0

180 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, which is a common delivery mechanism for exploits. Heuristics indicate the use of CVE-2007-5659 (Collab.collectEmailInfo) and JavaScript unescape functions, suggesting an attempt to exploit a PDF reader vulnerability. The ClamAV detection further confirms its malicious nature. The embedded JavaScript streams, particularly the deobfuscated ones, likely contain code to download and execute a second-stage payload.

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` `72b86840959ffddfef2f93b83ee905ce4259cc96e5bfd3bebc5bc502d6d2f45e`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	11834 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` `8073c5b67c4f7ed1f5de7317b7cd26e5eaf8848f7546e8a2484e6bf7ea811e9d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	4946 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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