PDF malware analysis — malicious · 43d64cd201459e2d

MALICIOUS

PDF

11.9 KB

MD5: 32038e5d6bf8a926d665a58d85bad8f9 SHA-1: 57ad825582967da2aa222974960fcfd27d9a639e SHA-256: 43d64cd201459e2d29766854b2412be942532db8744546673e6501ca3f063439

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The critical heuristic CVE_2007_5659 indicates the exploitation of a known vulnerability in PDF handling, specifically related to the `Collab.collectEmailInfo` JavaScript function. This function is used to launch embedded JavaScript streams, as confirmed by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of deobfuscated JavaScript files (`legacy_pdfkit_stage_000.js`, `legacy_pdfkit_stage_001.js`) suggests that the embedded script is designed to perform further malicious actions, such as downloading and executing a second-stage payload. The ClamAV detection further supports the malicious nature of the file.

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-36065 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36065
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` `9c67560e8c63b720885d3efc1627b844b86a6ec08e99e5b65a22eae832045756`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19C	431 bytes
`legacy_pdfkit_stage_000.js` `4248e802f1a42b26459d47e66baf6fb618896fbad857d2274238b20bf849bcf9`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12297 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `dfd3b8f4a81933338c3812d510be23c2603743aa8f54662bc5ea7e6233ebd7b7`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5047 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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