PDF malware analysis — malicious · 7daaf10a2e03ae69

MALICIOUS

PDF

18.9 KB Created: 2007-12-34 66:15:26 Authoring application: Adobe

MD5: 7846dcbdb241990e01cc1387860022eb SHA-1: e7796faa2af741f4f6872c9245ae7363a80afc36 SHA-256: 7daaf10a2e03ae699dbc625720d78d07a8f570707592ac53fb68687ffbb94eda

338 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file contains multiple critical heuristic firings indicating exploitation of CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659. These vulnerabilities are leveraged through embedded JavaScript, which is further obfuscated and uses eval() and unescape() functions. The embedded JavaScript is likely designed to download and execute a second-stage payload, as suggested by the ClamAV detection of Js.Exploit.Shellcode-18 on an extracted artifact. The file's purpose is to exploit these vulnerabilities to achieve arbitrary code execution.

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 detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0032_000.js` `555ccd864dccfcc673c98f57719c4ef3e478efec75e360e50575f1609d7aef53`	pdf-javascript-stream	PDF /JS object 32 at offset 0x3F4	142 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0532_001.js` `32d555ada4eb33b4096efed2b87dc28a10cb0d3ee161b3bb29a6556d96630fdf`	pdf-javascript-stream	PDF /JS object 532 at offset 0x2E6	205 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `890c44582e9a84100cd3dbd980c9afa135eecf0daa33e6eb1601b32eec07ad26`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x4BA	3022 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).
`legacy_pdfkit_stage_001.js` `a51be0dbae17ccc60415d33c7e7a6d1676af5b3790b97cffc308dd51daa73191`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x285E	2828 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).

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