PDF malware analysis — malicious · 19f68c3f626a7755

MALICIOUS

PDF

12.6 KB

MD5: ad486181b7444a4dfb27a0bfb371206a SHA-1: f81130001721c10b6eb3b54e23a0d3ce131a0008 SHA-256: 19f68c3f626a77550550290d49a51fbc4722ef582877ce37e9a789b9ed90d0f7

78 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, triggered by the CVE-2007-5659 vulnerability using the Collab.collectEmailInfo method. This JavaScript is further deobfuscated into two separate files, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js. The presence of these scripts and the specific CVE exploit indicate the document is designed to execute malicious code, likely for downloading and running a secondary 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` `4aa42a40abc8299272ee5ee86fa5d8cfa82dda9dedbc0a1797c83b6e3f440ab2`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	12241 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `bb980dcec907fca120097cc92b521d2f2c7fdaa6f81aa371adbedf369cacfba0`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	5074 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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