PDF malware analysis — malicious · 998877112d0a415c

MALICIOUS

PDF

12.2 KB

MD5: 153d816741a77774b1ff68ec7d9c80d7 SHA-1: e79193a3c5743be182df34c4cb53196fc12878f6 SHA-256: 998877112d0a415c65a62b2d72022effd4d22d3a812673bed8d4ec55f257d7c4

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious JavaScript

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability, specifically targeting the Collab.collectEmailInfo function. This exploit is designed to execute arbitrary JavaScript, which in turn is used to deobfuscate and likely execute further malicious code from embedded streams. The presence of multiple deobfuscated JavaScript files suggests a multi-stage attack designed to download and execute a secondary payload.

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-36062 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36062
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` `068944f8c011a88ab770b45c6de142b9305a1f515d410204d5eadd9ac2b5bfb3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	373 bytes
`legacy_pdfkit_stage_000.js` `cee3b3f7b9620938e209d060c8d1931b0c897185006aebf864a259129d98ae81`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	11939 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `27824bee6a9eea73dc171a145c7cd0d110f95cb77bb699238f923fdd91f0c7ab`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4870 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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