PDF malware analysis — malicious · 2bbe59039435d058

MALICIOUS

PDF

12.0 KB

MD5: c53ea93ec2ba23bcecb99399167f52d6 SHA-1: 04111e4971645a50dc8a928563c280a7608e42e4 SHA-256: 2bbe59039435d0583caab9f9baa07f95f4d7351c9b0408750ca48d734c5dd7d5

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. A critical heuristic, 'CVE_2007_5659', specifically identifies the use of 'Collab.collectEmailInfo' to execute JavaScript, suggesting an exploit targeting this vulnerability. The file is also flagged by ClamAV as 'Pdf.Exploit.Agent-36065'. Two deobfuscated JavaScript files, 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js', were extracted, implying a multi-stage attack where the initial PDF likely serves as a dropper for further malicious activity.

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` `e5870beb48ec3de14da9a67e94d631fab1d069c14da5b7998ec68f2c2c4ffb90`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12277 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `ed2f95319050ae7aab5b1b3d75ce089f1ec93df0648445a8732425d293937ecf`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5085 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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