PDF malware analysis — malicious · 2c53f4c038c6cfae

MALICIOUS

PDF

165.7 KB Created: 2009-12-16 21:48:21 Authoring application: PDF Editor - Foxit Software

MD5: 0b957be09aaa100e5ae4ea10728214d5 SHA-1: 9e27fcd2656361cd56d0512272067e5057de90c7 SHA-256: 2c53f4c038c6cfae840317f75119ebefa6cc31b188f05d8c142c4605e810033a

196 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1071.001 Web Protocols

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The critical CVE_2009_4324 heuristic suggests exploitation of the media.newPlayer vulnerability. The presence of embedded JavaScript streams and the 'unescape()' and 'String.fromCharCode()' calls point to obfuscated code designed to execute malicious actions, likely downloading a second-stage payload. The ClamAV detection further confirms its malicious nature.

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. (matched in decompressed stream)
ClamAV: Pdf.Exploit.Agent-19986 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-19986
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.
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
PDF paints image(s) but contains no text operators info PDF_IMAGE_ONLY_LURE

PDF has 1 image XObject(s) and the content stream contains no text-emitting operators (BT/ET, Tj, TJ, ', ") in either raw bytes or decompressed streams — this is the screenshot-as-PDF pattern used to bypass text-based scanners and to deliver instructions purely through rendered pixels. It is informational unless paired with invisible links or risky URI context.
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_obj0009_000.js` `a1ea4d9b70c078224a51dbf8a5c198730e17a2c2962ec54ccf10ce99c903207d`	pdf-javascript-stream	PDF /JS object 9 at offset 0x28F86	3583 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).
`javascript_obj0014_001.js` `0adad2a915ee0405d60c16305dd5bbbfde6301a10e197b96f2610cfa06e22fa8`	pdf-javascript-stream	PDF /JS object 14 at offset 0x28A0D	3585 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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