PDF malware analysis — malicious · 3f30a55437b7e3d5

MALICIOUS

PDF

11.9 KB

MD5: 1d31a3330cb5e980465261e940745f06 SHA-1: fb377bbb06ecdbdc22f474243565402702773a21 SHA-256: 3f30a55437b7e3d55965d88756627e995284ef91118124fef3b071897ead0c9b

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that exploits CVE-2007-5659 using the `collab.collectEmailInfo` function. This JavaScript is further obfuscated and split into multiple streams, indicating an attempt to hide malicious activity. The presence of deobfuscated JavaScript files (`legacy_pdfkit_stage_000.js` and `legacy_pdfkit_stage_001.js`) suggests a multi-stage attack where the initial PDF acts as a dropper for further malicious code. The overall goal is likely to download and execute a second-stage payload.

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` `c86a8ef5028bc58a212a15b0e8bf1bbd6737796dc671a4a23ba97c0aaeac0bc0`	deobfuscated-js	z-percent hex-pair decoded JavaScript at offset 0x2E8	5036 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` `666e624d919a81ffece9ba54f46023a16bd996eb2777f6f7ac8fc8965bbd64a0`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2E8	11971 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).

Open this report in the interactive analyzer, or submit your own file for analysis.