PDF malware analysis — malicious · f031ccf0bdc53deb

MALICIOUS

PDF

12.0 KB

MD5: 4790227543c013c95fa611ab13e75162 SHA-1: 52cab3e1b3b84be59426244291633d70acc82aec SHA-256: f031ccf0bdc53deb02921d382458afbb3524cec12f3e6b87578af375afe790da

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2007_5659 heuristic indicates that the JavaScript is designed to exploit a known vulnerability (Collab.collectEmailInfo) to execute malicious code. The extracted JavaScript files, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, are likely responsible for downloading and executing a second-stage payload, as suggested by the ClamAV detection of Pdf.Dropper.Agent-9449004-0. The exact nature of the second-stage payload cannot be determined from the provided evidence.

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.Dropper.Agent-9449004-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-9449004-0
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` `1847af0a099665b6ac45af66402e56ed64237a1b287618ee3d6643267fda6f35`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	343 bytes
`legacy_pdfkit_stage_000.js` `04902c4d157ff7a505f10681b3023b674b4cb853a3d7ef5455936136425586b4`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	11932 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `84ac843ee8960e74f7fc830186f2ec0a46fb16e7d73afa2f3a58ad515fa88a5f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	4923 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.