PDF malware analysis — malicious · 22d85edc98c3e3a2

MALICIOUS

PDF

11.6 KB

MD5: 9e210f52f4f0c4f014619aea27595266 SHA-1: 06c46b5b039a66935628e39986f9372528a33ffa SHA-256: 22d85edc98c3e3a2653110e7e6e58af6ca3802f36467adc4d8785341b2500126

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. A critical heuristic, CVE_2007_5659, indicates the exploitation of a known vulnerability using JavaScript that is constructed by concatenating info fields and extracting characters at a fixed stride. ClamAV also detected this as Pdf.Exploit.Agent-36065. The embedded JavaScript streams, named legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, likely facilitate the execution of a malicious payload.

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` `dbace78eaa3886a6f4a93f398614b6403ea53353583f7b587a503ba8a67296b3`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	11952 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `2f66d7a1bad420fd0fc9e0abb7cd60b88b5f3a0a2602fe69de45d88664e0766e`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4910 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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