PDF malware analysis — malicious · 8f4cb9f467581a4b

MALICIOUS

PDF

12.1 KB

MD5: c5670e4447d0448ad589531524e87f45 SHA-1: f8caad8045080207c750b902afee8c1800967e3e SHA-256: 8f4cb9f467581a4bf15acdd2603c3688cadb1c82b1a91ecacbc5e913183681a7

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript, identified by heuristics as potentially malicious and obfuscated. Specifically, the 'CVE_2007_5659' heuristic indicates the use of a known exploit targeting Adobe Reader's 'Collab.collectEmailInfo' function. The presence of deobfuscated JavaScript files ('legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js') suggests that the embedded script is designed to download and execute further stages of malware. The ClamAV detection also flags the file as suspicious due to obfuscation.

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: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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` `6f60a1053baafdc578f85eae84a2dc6d16775fbd66240d82cbfb7b4f4ff4e90a`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	295 bytes
`legacy_pdfkit_stage_000.js` `d75e1574140db65650524fe4ee59a1e15062b191e5e64ffb5ec3300a96c991f0`	deobfuscated-js	z-percent hex-pair decoded JavaScript at offset 0x2E9	5118 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `238a11b0613aa17e56218afa4eef9ee5d39f903d50cb1c4a7bcee8010ca7ca22`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2E9	12201 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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