PDF malware analysis — malicious · d739fb40d61b041d

MALICIOUS

PDF

7.4 KB Created: 2010-04-14 17:28:07 Authoring application: Ilotni xofisigociw

MD5: 2ae93db828d27747cb766f73f77f03fb SHA-1: a4f9de57d048ec71bbcededdcf7700139347d5c5 SHA-256: d739fb40d61b041da264d9c83af8d24a0faf67dde2b3d6148c2ace32d1ac178a

360 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains multiple critical heuristic firings indicating the exploitation of several CVEs related to PDF JavaScript execution. Specifically, it uses XOR-decoded JavaScript embedded within text streams, triggered by an OpenAction. This JavaScript is designed to download and execute a second-stage payload, as indicated by the ClamAV detection of 'Pdf.Dropper.Agent-7309948-0'. The obfuscated nature of the script and the use of known exploits point to a dropper or downloader functionality.

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.Dropper.Agent-7309948-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7309948-0
OpenAction trigger high PDF_OPENACTION

PDF has an /OpenAction — code runs automatically when opened
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` `f5395cd0d0431bcbb3827abe0f85b918cc35fdff3712ba99ccb16d37ce604d9f`	pdf-javascript-stream	PDF /JS object 14 at offset 0x17A7	1478 bytes
`page_word_xor_stage_000.js` `e5b6d861b4282f5ed48fd6f65aa45f57d7f148a5225e135413c6d6d27ec1780f`	deobfuscated-js	page-word XOR decoded JavaScript (decompressed, key=0x91) at offset 0x68A	3220 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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