PDF malware analysis — malicious · 3a37f7c3aac82c0f

MALICIOUS

PDF

12.8 KB

MD5: 27e4ddf60bb4267893afab97a665d144 SHA-1: fa177c07091f6e9f80007545742029392ef37afa SHA-256: 3a37f7c3aac82c0f9abd563f36efd1ca8f593fb0712071872c60233618a6c0d8

78 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability (Collab.collectEmailInfo). This JavaScript is designed to deobfuscate and execute further JavaScript streams, identified as legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js. These stages likely download and execute a second-stage payload, indicating a multi-stage attack. The presence of multiple JavaScript streams and the specific CVE exploited points to a downloader or exploit kit.

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` `480663a59b866c4260a3becfb762e5e3c09036bc3e3f187fdc9977bd942508ce`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	12486 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `4db78fdd816c88f603b94ff67bd1fc01ac2bb733c51228c73465d66d728d3003`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	5198 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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