PDF malware analysis — malicious · 910cc178f67f402e

MALICIOUS

PDF

16.2 KB

MD5: 1b4b3a08c6c6ad6c62d20dc771f49975 SHA-1: 41a6a9305ac42669d67dbec715f050bb51d13b5e SHA-256: 910cc178f67f402e6a0e89ba12f2034c88c4beee13775bb0e0e45946385bed79

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that utilizes eval() and unescape() functions, indicating an attempt to obfuscate malicious code. The critical heuristic firing for CVE_2009_4324 confirms the exploitation of a known vulnerability in Adobe Reader. The deobfuscated JavaScript likely downloads and executes a second-stage payload, as suggested by the presence of multiple JavaScript streams and the nature of the exploit.

Heuristics 5

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)
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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_obj111711_000.js` `efeae9481e7033d369afb9acf9d55567d896d6f1511cfcc888c1a97a68049857`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3040 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 4 long base64-like blob(s).
`javascript_obj111712_001.js` `e77391f6940d99246e2941ce0b797d859daa30757bb8de289274301f1e9303ae`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xDA4	10818 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 4 long base64-like blob(s).
`javascript_obj111713_002.js` `5fde7f01b9d15e496578d6d70dd058d19b42626cc7289802de31c3e0d9c66df0`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x381C	2125 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 4 long base64-like blob(s).
`legacy_pdfkit_stage_000.js` `77e31ee392e03e0109a99a651a1f965cc21f4a579111db265d7fa458cb9d2899`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xDA4	1080 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `b9bbdb407d56ebae109bdbbe4891fe0572a56e1842eb31253a773ceb1f5e0fd6`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x381C	168 bytes
`legacy_pdfkit_stage_002.js` `938bff82ef5963dfc8164c527b08e0ca58d0183190a6d5df75374f2fdaacc25d`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xDA4	1249 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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