PDF malware analysis — malicious · d94d0375d5be1435

MALICIOUS

PDF

92.9 KB

MD5: 1d8c464360b9b4d0639cf1b82e44468a SHA-1: bfc33661076e253c29d186d26a0b05b3490400e7 SHA-256: d94d0375d5be14351eadc363734add0cab5dcb27e51f7817e7545acd6561fd10

318 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The file is a PDF containing embedded JavaScript that exploits multiple known vulnerabilities (CVE-2009-0927, CVE-2007-5659, CVE-2008-2992) related to PDF object handling and JavaScript execution. The heuristics indicate that the PDF launcher concatenates info fields, extracts characters, and evaluates the result. An extracted and deobfuscated JavaScript file, 'legacy_pdfkit_stage_000.js', was also detected, suggesting it is part of the exploit chain. The overall intent is likely to download and execute a second-stage payload.

Heuristics 8

Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927

PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (identified after JavaScript deobfuscation)
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)
util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992

PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (identified after JavaScript deobfuscation)
ClamAV: Pdf.Exploit.Agent-36307 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36307
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0008_000.js` `ff85ba36ee6da08cb43d42b56a07e63d91b27f45bbbd69e253d47c27e8b1e319`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	3066 bytes
Detection ClamAV: Pdf.Exploit.Agent-36307 Obfuscation or payload: unlikely
`legacy_pdfkit_stage_000.js` `46cd285ef26a9cd445692d539f0d357a75c255e7ffe47d769f7643129c949db5`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xE15	6084 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 11 eval/decoder/string-building token(s).

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