PDF malware analysis — malicious · b2e924e6cb5bda24

MALICIOUS

PDF

12.0 KB

MD5: 38fed96e1c933cefdb708f6a80e8af7a SHA-1: 606fef78989b3cc35e47214cf9c048264f80d291 SHA-256: b2e924e6cb5bda248d3e5101745da278c22f706da25ee311f8cb87ad526e5625

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

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 specific fields and extracting characters at a fixed stride. This suggests the PDF is designed to exploit this vulnerability to run malicious code. The ClamAV detection further confirms its malicious nature. The presence of deobfuscated JavaScript files, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, indicates a multi-stage loading process, common in exploit kits.

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` `bb6f850932a55e2048a6312318a12525fe0394a97a937fc0dd72193431159937`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12237 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `f20d55cd49b62faf7ae2c3ac625f00533a42f6198aa79c4cbe6cfad39af50cf2`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5136 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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