PDF malware analysis — malicious · c0a97a114b185ee2

MALICIOUS

PDF

12.7 KB

MD5: 3c6f4cc2d1710d88bedd1a6e918eadc9 SHA-1: f2eec79c0e106acf5e689ff4b7c048315a365756 SHA-256: c0a97a114b185ee20fbbb1c914b70447967a0cf22603db6d0f48c130ed43d7da

78 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 the exploitation of a known vulnerability using JavaScript to collect information and likely execute further code. The presence of deobfuscated JavaScript files, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, suggests a multi-stage attack where the initial PDF acts as a dropper for more complex malicious scripts. The exact intent of these scripts is to download and execute a second-stage payload.

Heuristics 4

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)
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` `1a1d769d3a9b790b02b53bbbee1ba8c9b34fe760758229e0ca41c3ca16e9ccde`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	12446 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `a9bac2611420710d23af34a85d480c695c1e088888dcd77e2d612ac8fef33461`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	5174 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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