PDF malware analysis — malicious · f79af81b9d2b970d

MALICIOUS

PDF

9.5 KB

MD5: c7b19a589af76f10f0ae3ae6b12dc1e6 SHA-1: 87d6402a70e6c726822ef5d7be7df37626798457 SHA-256: f79af81b9d2b970d99c5940ffc80e4fe799639c5785145dce2cadf8f1adf7936

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.001 Malicious Link or Unsafe File

The critical heuristic firing for CVE-2007-5659 indicates the exploitation of a specific vulnerability in PDF documents. This is further supported by the presence of embedded JavaScript streams and the use of unescape() calls, common techniques for obfuscating malicious code. The ClamAV detection of 'Pdf.Exploit.Agent-35905' confirms the malicious nature of the file. The embedded JavaScript is likely responsible for downloading and executing a secondary payload, a common attack pattern for this type of exploit.

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-35905 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35905
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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` `d8a6b4ad1abf04d0c4a4f89535cfb57f7312edef25c443f4e844c8ec9d0929dd`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	352 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `69675162ac1d542e417a5a610b731809b200842d76c5471a6cc1450753c5b13b`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	12217 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `f456c2d399363f83465ea76dc0698677d67b6b733e7406c17db2250a629360e4`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	5051 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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