PDF malware analysis — malicious · c60a4d67f8aa5ce2

MALICIOUS

PDF

12.3 KB

MD5: fbe0720cd4e3f4b7d60e2431820488b4 SHA-1: ae06859797bad08bfde6360a964247b9377f60bd SHA-256: c60a4d67f8aa5ce2ecbc1a8b1c3cb05b38a9bee724facb0e95240a03f1a7df34

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The critical heuristic 'CVE_2007_5659' indicates the exploitation of a known PDF vulnerability using embedded JavaScript. The file contains multiple JavaScript streams, with two deobfuscated as 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js'. These scripts are likely responsible for downloading and executing a secondary payload, as suggested by the 'unknown_exploit_score' and the ClamAV detection 'Pdf.Exploit.Agent-36065'. The 'Collab.collectEmailInfo' function is a key indicator of this exploit.

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` `fba18db672e7cc8791f0a60acd149bdd9d14a71e24a2af437af94206dc206594`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12626 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `67d5013dce075a45af8160380ca625c17e3b721bf072ed37018d1c9567029aa5`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5295 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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