PDF malware analysis — malicious · ec562fa18485b321

MALICIOUS

PDF

7.4 KB Created: 2009-01-35 62:12:26 Authoring application: Adobe

MD5: c4300406306e67309ae0c34675296f7a SHA-1: 0520670c77f2a4f063c894ea1c905bf2ad29fb14 SHA-256: ec562fa18485b321ae852e284e152caff0e87d69ed6fd8aecacf5fd4861235f4

368 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains multiple critical heuristic firings indicating exploitation of CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659. These vulnerabilities are leveraged to execute embedded JavaScript, which is further obfuscated and uses eval() and unescape() calls. The presence of multiple deobfuscated JavaScript files suggests a multi-stage download and execution process. ClamAV also detected this as Pdf.Dropper.Agent-7320435-0.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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)
ClamAV: Pdf.Dropper.Agent-7320435-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7320435-0
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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 8

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0032_000.js` `dacd581c96107d469e4da12e8c872d00030106c1043ca413981241cdc60b2362`	pdf-javascript-stream	PDF /JS object 32 at offset 0x42A	135 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0034_001.js` `2a3b192d7744ec24b6bb62f144ffc6e632d9b84770626419db9019b65ec94998`	pdf-javascript-stream	PDF /JS object 34 at offset 0x4EA	142 bytes
`javascript_obj0036_002.js` `138bf1bfe5afac499d757584e1d90ef547566d1822fa14055c1301aeb3691b8a`	pdf-javascript-stream	PDF /JS object 36 at offset 0x10B	163 bytes
`javascript_obj0038_003.js` `ac6a73f86ceefee9e903495a41bb51c2d7ce2f2b12b5920c2c4fb0ca4037dd61`	pdf-javascript-stream	PDF /JS object 38 at offset 0xC5B	182 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0078_004.js` `f0bc57547400c682d7d3131a1ebc9d01fe6503e5b940b24e9da855ce69c9f8e2`	pdf-javascript-stream	PDF /JS object 78 at offset 0x7C	49 bytes
`legacy_pdfkit_stage_000.js` `f971e795dce0571b4538993a6d9de80061ba1c2fa03acb82431345411e3a4f53`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x5E4	1634 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `9d2674b9fefb02e4cf381ff8d3b12518de82b4d208f8f5cbcfafae36b793e9d4`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xD9B	1800 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_002.js` `c228d3c78b8c8da2bb4d0fa617edd311b5116377305a2de7e1d46980b9fa7a0d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1406	2938 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

Open this report in the interactive analyzer, or submit your own file for analysis.