PDF malware analysis — malicious · 1c8f21f36915778a

MALICIOUS

PDF

4.3 KB Created: 2008-09-24 19:47:56 Authoring application: Adobe

MD5: e46ab9cb9c62c60d117fa3394beb065d SHA-1: 22bc19b6c182517ba5b1252c5d476458565bed27 SHA-256: 1c8f21f36915778a963c9439be7593d20c3e8d483ceb7e8287ea63885129477c

300 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file contains multiple critical heuristic firings indicating exploitation of CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659. These vulnerabilities are leveraged through embedded JavaScript, which is further obfuscated and uses eval() calls. The ClamAV detection 'Pdf.Dropper.Agent-1828658' strongly suggests this is a dropper designed to download and execute additional malicious content. The deobfuscated JavaScript, legacy_pdfkit_stage_000.js, is likely responsible for this payload delivery.

Heuristics 8

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)
ClamAV: Pdf.Dropper.Agent-1828658 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-1828658
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `7836c832057b0523d6671f9477b870a5b8ea3e8925b20704abee53442907d3fe`	pdf-javascript-stream	PDF /JS object 6 at offset 0xBFC	84 bytes
`javascript_obj0016_001.js` `2104864f64e2701ff57b9fbbc2acda2db8da0bb5c6b4d91a5bdc6e8c2e942ae7`	pdf-javascript-stream	PDF /JS object 16 at offset 0xC95	385 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0026_002.js` `96141074d0aaf94add0eda41578a972f3a97e2c795343d9b8eacb41e036486e3`	pdf-javascript-stream	PDF /JS object 26 at offset 0xDE4	113 bytes
`legacy_pdfkit_stage_000.js` `341f97b9d1d264cdc216160a8f69b3f7eb42ef618943b84716080438a14e4951`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1BB	6411 bytes
Detection ClamAV: No threats found 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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