PDF malware analysis — malicious · 88dfc4fd824dbaf1

MALICIOUS

PDF

9.5 KB

MD5: 5cca28de8ea43f08ae77089fb212d052 SHA-1: 55932e713167f8040a9f7c3ac7b0dc33eac2a47c SHA-256: 88dfc4fd824dbaf13831d7d9a9fdfd633d438558b3f43e4753d011c2f6144e07

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability (Collab.collectEmailInfo). This exploit is designed to execute arbitrary code, as indicated by the critical ClamAV detection and the presence of multiple deobfuscated JavaScript streams. The primary attack vector appears to be the exploitation of this specific PDF vulnerability to deliver a secondary 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` `f0a171251845d1e4d22bd9aada3e193fc92f43665382578a6a13405ed10daacc`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	12079 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` `6d45a69d6d64d2e8799b97d19cdd5e9a5ff3eb5670b7cd509aa4923aae7f606a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	5104 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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