PDF malware analysis — malicious · d2a3174f778459ea

MALICIOUS

PDF

9.3 KB

MD5: f819cc1d274ae589e4833609b45be9a2 SHA-1: d6f01234bbc995262da7bbbf248936a59f69624e SHA-256: d2a3174f778459ea3fa88d77ebb0a74d5568cd410e05ac4d29daa12dbed99085

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.001 Malicious Link or Macro: Malicious Link T1204.002 Malicious Link or Macro: Malicious Macro

The critical heuristic firing for CVE-2007-5659 indicates the exploitation of a known vulnerability in PDF readers. The embedded JavaScript, particularly the deobfuscated streams, suggests an attempt to download and execute further malicious content. The ClamAV detection further supports the malicious nature of the file. The PDF launcher concatenates info fields, extracts characters at a fixed stride, and evaluates the result, which is a common technique for exploiting this CVE.

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` `c2cbf06fc9ae395378717916175454f8b095e507dcdc9ddd9683834056ebd6d1`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	11882 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` `5e59eb7b6434ff398deedb840c8f21723b231d6bbf674c797f978d68bb811acf`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	4933 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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