PDF malware analysis — malicious · 59d65cafd79384a3

MALICIOUS

PDF

11.9 KB

MD5: 1100b793b9df7c90d76b3ac46be3a759 SHA-1: c8e1ef93c6709b1931fef2a9ab38ada74bfd0649 SHA-256: 59d65cafd79384a3f0cf64b4942d000c667e0fb8044ee68a7fc639ee7975a4e0

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, specifically identified as exploiting CVE-2007-5659 via the Collab.collectEmailInfo method. This technique is used to launch obfuscated JavaScript streams, which are further deobfuscated into two separate JS files. These scripts likely download and execute a second-stage payload, indicated by the critical ClamAV detection of Pdf.Exploit.Agent-36065.

Heuristics 5

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-36065 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36065
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` `9c67560e8c63b720885d3efc1627b844b86a6ec08e99e5b65a22eae832045756`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19C	431 bytes
`legacy_pdfkit_stage_000.js` `248d0855643fa3cb930186abda4f64c91ac5e6079ab6cd8e7b254241fcc76fdf`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12198 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `398b9fc92e4d13421b54fd8f043d590f5dfaa2f61fb9b802563a1518778d57da`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5014 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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