PDF malware analysis — malicious · 3256d512394b801a

MALICIOUS

PDF

12.4 KB

MD5: a95b6897f78558cd6f2089370fc9b10d SHA-1: 11483c4d2ae55fab82b569a5b443bc5cb93bdbc9 SHA-256: 3256d512394b801a7c1c02b36c1a674195ca5508df219600ee40483e5e8978e3

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The sample is a PDF file that contains embedded JavaScript, identified by the CVE_2007_5659 heuristic which specifically targets the Collab.collectEmailInfo method. This method is known to be used in exploits that execute arbitrary JavaScript. The presence of deobfuscated JavaScript files (legacy_pdfkit_stage_000.js, legacy_pdfkit_stage_001.js) further indicates malicious scripting. The ClamAV detection of Pdf.Exploit.Agent-36062 confirms its malicious nature. The script's likely intent is to download and execute a second-stage payload.

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-36062 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36062
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` `068944f8c011a88ab770b45c6de142b9305a1f515d410204d5eadd9ac2b5bfb3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	373 bytes
`legacy_pdfkit_stage_000.js` `364440f7555c9a778e5c118cb0da92f0a6fe10ed03a4a3003b7f77c1c1fb2ca8`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12093 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `ff5d749b8fa6d691540730a8b715ce4df8219abdc1400fc5e429c0f3e31d8a61`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4978 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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