PDF malware analysis — malicious · b687117b354bff1f

MALICIOUS

PDF

13.4 KB

MD5: 291a4e7ecbf4524ecbc219f4f6b8631e SHA-1: 06d2f1d834142f923a44aec1b0c9f71a5e0d855b SHA-256: b687117b354bff1f2264f3deedd0329f774bab403e2a876364368706ee9de034

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability (Collab.collectEmailInfo). The heuristics indicate that this JavaScript is obfuscated and likely intended to download and execute a second-stage payload, as suggested by the presence of deobfuscated JavaScript files. The ClamAV detection further supports its malicious nature.

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-36064 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36064
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` `a5c8f0f722df4dd9876a0087e1eee65bd3020c5995f94f6729f7e17f3f3677a0`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	331 bytes
`legacy_pdfkit_stage_000.js` `543b66f18a1928bfcf7e0edc08492013e6439699fcf91ddf052f0d9fc5602883`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F2	12517 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `ad1b23d56b021467c21cccfc4fa5ebf3753ac32fca8abe802230613f00ff09c1`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F2	5176 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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