PDF malware analysis — malicious · fc5d102afb6f652e

MALICIOUS

PDF

12.0 KB

MD5: 97f40e9cce2e100cbbc8ace09f0f99d9 SHA-1: 2da3a96f50d437b479b1b27b0942267e59e31b9c SHA-256: fc5d102afb6f652e22cb36f3573734d41f5e5d00490bdd185a6aac3a0f2503fc

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that leverages the 'collab.collectEmailInfo' function, a known indicator for the CVE-2007-5659 vulnerability. Static analysis indicates that this JavaScript is designed to download and execute a secondary payload. The presence of multiple deobfuscated JavaScript files further supports the conclusion that this is a multi-stage attack. The ClamAV detection also confirms the malicious nature of the file.

Heuristics 6

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-35903 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35903
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.
syncAnnotScan annotation-staging primitive low PDF_FOXIT_SYNCANNOTSCAN

PDF JavaScript calls syncAnnotScan() — a no-op annotation-enumeration primitive used by exploit-kit JavaScript to stage payload reads from annotation /Subject fields before eval(). Not a vulnerable sink itself; rarely seen in legitimate PDFs. (matched in decompressed stream)
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` `860eae5f96eb426380281c575a089242b50523bbb4bbb8dd765e582cd9c07d2e`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	294 bytes
`legacy_pdfkit_stage_000.js` `4e3b2306e6cd72bac0356360f5fa8d15ff82224b60c361d0459e3e720ac828fc`	deobfuscated-js	z-percent hex-pair decoded JavaScript at offset 0x2E8	5079 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `2ea12219ec685ad45489b81edba21cce4cb7e22751fadec5902ee29ec2ebc2e9`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2E8	12239 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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