PDF malware analysis — malicious · 9439f6f699635357

MALICIOUS

PDF

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

MD5: 71accb627c228edd846b0d119cd8f13a SHA-1: 51360fe5c119483e3b1d7e0dfd5ec868de338d0a SHA-256: 9439f6f6996353574be40646776b7ffd645fea3a4d5cddb97a01b279b141716a

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 and obfuscated JavaScript. The JavaScript streams, particularly the deobfuscated ones, likely contain code to download and execute a secondary payload, as suggested by the 'Pdf.Dropper.Agent' ClamAV detection. The ML classifier also strongly indicates maliciousness.

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-7283828-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7283828-0
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` `d62bcbeccc971de9f8472b791704c17df7bda44e32e7478d423ff528e0d5f060`	pdf-javascript-stream	PDF /JS object 32 at offset 0x424	133 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0034_001.js` `399b93075bc3cb4b0a9464f30c92d53723637bb0f0eadc503ed2dcc114193abc`	pdf-javascript-stream	PDF /JS object 34 at offset 0x4E3	136 bytes
`javascript_obj0036_002.js` `1f775600d25b8b6a3d158da88e37d40af8ef20a4b2eb2171bbd93987e0ae6d78`	pdf-javascript-stream	PDF /JS object 36 at offset 0x107	153 bytes
`javascript_obj0038_003.js` `141158e99373a41490b3262fbc8ef22d30ade1a7671298d12c03a515c6f88b14`	pdf-javascript-stream	PDF /JS object 38 at offset 0xC4C	174 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0078_004.js` `13a7c9fe9dbc74dca88e07a795df7d4fedd55f7bb1f755086dbeec9d7e2d438d`	pdf-javascript-stream	PDF /JS object 78 at offset 0x7C	45 bytes
`legacy_pdfkit_stage_000.js` `aa658c1100e40862fa695a1d1637517ed02c9dfe1de8ae46ae75783776a8852e`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x5D8	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` `9074489d3906f862f17a5852bb4e1919b4153176f8fd2a44a61c45e23c54903f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xD85	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` `e14fc2e2eeccd5a2049a20654b680a2672a0a774a16e13159c974d1e83f255fa`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x13F0	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.