PDF malware analysis — malicious · 96c4f4f77400d0d0

MALICIOUS

PDF

5.0 KB

MD5: df2e3bc0b2138c4fbe304ec653d24711 SHA-1: 7ba9ea8e3b41b54a5ccfe1a40aae3681dbc04d3e SHA-256: 96c4f4f77400d0d0434816146741d8623c343c4a72ec9bced3472851974612c0

378 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Shell Scripting: JavaScript T1204.002 Malicious File: Malicious JavaScript

The PDF file contains embedded JavaScript and triggers multiple critical heuristics related to known PDF exploits (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659, CVE-2008-2992). These exploits leverage PDF /Info fields to execute JavaScript. The embedded JavaScript, identified as 'info_stride_js_000.js', is likely responsible for downloading and executing a second-stage payload, as indicated by the ClamAV detection 'Js.Exploit.Shellcode-18' on an extracted artifact. The file is classified as malicious by ClamAV as 'Pdf.Exploit.Agent-36895'.

Heuristics 9

media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324

PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009. (identified after JavaScript deobfuscation)
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-36895 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36895
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_obj0014_000.js` `6f3b3827cc60abb29d3d2569bddfbf7f64a6116b50dd1744b603a29516d0dd8f`	pdf-javascript-stream	PDF /JS object 14 at offset 0x1059	686 bytes
`info_stride_js_000.js` `277bf1ddf46e6d14ebe1e391e91d900d4e6d8e36c1aa94cfa8cfd65ee6b46a4c`	deobfuscated-js	PDF /Info fields via stride 5	6433 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 12 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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