PDF malware analysis — malicious · efcca3344f5783e4

MALICIOUS

PDF

11.8 KB

MD5: a7b2eeff10225fea4572cb424c0aa30e SHA-1: 5f84daf9c7e377d6f885caa5360fbe9fa672b5ad SHA-256: efcca3344f5783e43a2431ae7a9f58629252744d8a12746a6aeee2ff9593b56b

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability, specifically targeting the Collab.collectEmailInfo function. This exploit is designed to execute arbitrary JavaScript, which in this case is further obfuscated and split into multiple streams. The presence of 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js' suggests a multi-stage attack, common for downloading and executing further malicious content. The ClamAV detection of 'Pdf.Exploit.Agent-36065' confirms 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-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` `3337c29eef1f0c4ef1e47730687a98979acbc3913cd14bd37c1a85bc07cdfdef`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12090 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `64de57c8f5bdd3c391bf0cd61c053ecb2732fe45f3a88d821df61aa340b37a32`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4948 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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