PDF malware analysis — malicious · d845f3c06afd1805

MALICIOUS

PDF

13.5 KB

MD5: 18dace5259d26d4da02c20b23b5eb005 SHA-1: fbbbe219d3316b2dc79b075c468061d4c6bd2810 SHA-256: d845f3c06afd1805aa294dcad7c8cd285982cf67f554f5b6b2a5f28967204c70

78 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability, specifically using the Collab.collectEmailInfo function. This JavaScript is likely designed to download and execute a secondary payload, as indicated by the presence of deobfuscated JavaScript files extracted from the sample. The attack pattern suggests a multi-stage infection process initiated by exploiting a PDF reader flaw.

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` `bedd676af9bf2e3ca07f9e3a10d07bc561e9745801f30653ef176c0c1e7620a3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	336 bytes
`legacy_pdfkit_stage_000.js` `dc91b466f4270d85fba2df02701a422494fed17904682617c2c2aa5ab28df886`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2EC	12637 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `d05b34d71ef6e97549153dca078eb807b26a938fee869098faf8bb0d6b1d2906`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2EC	5214 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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