PDF malware analysis — malicious · 215b37f45903b5ec

MALICIOUS

PDF

11.6 KB

MD5: 047162fa78c0b8450c7b53a019f79eb8 SHA-1: 4d459832d85748f8b2cb4b49d7fc34b1f5742439 SHA-256: 215b37f45903b5ecd69571a8699c9a565b4a463aba953712ca6a564f4fbf0b36

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

The critical heuristic CVE_2007_5659 indicates the exploitation of a known vulnerability in Adobe Reader via embedded JavaScript. The PDF launcher concatenates fields, extracts characters at a fixed stride, and evaluates the result. Two deobfuscated JavaScript files, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, were extracted, suggesting a multi-stage download and execution process. The ClamAV detection further confirms 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` `8547cb14a637160ccb04d569ae838751ce587d30f7d9a50aaf7e33d42275e97e`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	11935 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `e6a0ee220f7dce45ab4631d94ec786b5d955377713d043063dd4be0e2fca1662`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4844 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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