PDF malware analysis — malicious · 35d8ca5f023e1e44

MALICIOUS

PDF

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

MD5: ed39a1f9570795e61f0fde62f648ce3a SHA-1: 3c91a1a430f7895091cb9e674599ba737de0b656 SHA-256: 35d8ca5f023e1e4486bb913134c2d8171430faf7eca1b5e4a20ef143f27792b2

240 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 (media.newPlayer), CVE-2009-0927 (Collab.getIcon), and CVE-2007-5659 (Collab.collectEmailInfo). These vulnerabilities are leveraged through embedded and obfuscated JavaScript, which is then decoded and evaluated. The primary function of the script appears to be the execution of arbitrary code within the PDF reader, a common technique for delivering further malicious payloads.

Heuristics 7

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)
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 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0032_000.js` `1e8b86d7bb68f599ea29341b70498b4f7d03686a0e678c25390a5c0432628655`	pdf-javascript-stream	PDF /JS object 32 at offset 0xCA1	109 bytes
`javascript_obj0034_001.js` `fbe981ddccc84f3c990185e0b94b2baba60b4a329c845390af917778f94e72a1`	pdf-javascript-stream	PDF /JS object 34 at offset 0xD5D	183 bytes
`javascript_obj0036_002.js` `5ff9f4f5eb5239dcc888fbb2fcde54a1fffbe2dbd85e40e8c3427fe82a07295a`	pdf-javascript-stream	PDF /JS object 36 at offset 0xED3	198 bytes
`javascript_obj0038_003.js` `91c6d05feed2a7c5a1a6cf59a36649013743cf78ce86541e268cc2c1db227c7d`	pdf-javascript-stream	PDF /JS object 38 at offset 0xFBB	38 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0078_004.js` `bc8faa385ef009b1d1b34651903412c5e87a38b60c23dc36a13b7af399bd41f9`	pdf-javascript-stream	PDF /JS object 78 at offset 0xE3C	32 bytes
`legacy_pdfkit_stage_000.js` `2d12afdbd4ccf9a5b721766788bb85cbe659da9586eed10fd63fdf448cb79e90`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x20C	6429 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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