PDF malware analysis — malicious · d475fd26d44267b6

MALICIOUS

PDF

9.7 KB

MD5: a230961a635f023ac9f6dd9b5944f124 SHA-1: 1f278002c6c05a44cba302ead80697c5e837bf49 SHA-256: d475fd26d44267b6f1a55bca3759e75455109f2ba59beb7924e999e87fabb50b

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious Link/URL T1059.003 Windows Command Shell

The PDF file contains embedded JavaScript, which is triggered by the CVE-2007-5659 vulnerability. The JavaScript is heavily obfuscated but appears to be designed to download and execute a second-stage payload. The ClamAV detection of Pdf.Exploit.Agent-35905 further supports the malicious nature of this file.

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` `263d892c231e4bdb4108a019f1b62ab9025d12c9755fffb79d0ede0d97569f5e`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	12491 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` `66472255c3c99e45effa9ed6a34e726834f222d39a89dd16601a30aaa641bf23`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	5232 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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