PDF malware analysis — malicious · a3468d8eae68613f

MALICIOUS

PDF

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

MD5: ba470ee8937a36e33a6d47013e2d4c62 SHA-1: 466a1456089b678989880ded7317fb2c88fb2e16 SHA-256: a3468d8eae68613f8436a93c35dee425d2720ce7d467d07af70cf68befff4e56

298 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

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 indicated by multiple PDF_JAVASCRIPT and PDF_JS firings. The ClamAV detection of Js.Exploit.Shellcode-18 on an extracted artifact confirms the presence of malicious JavaScript. The primary attack vector appears to be the exploitation of these PDF reader vulnerabilities to execute arbitrary code, likely for downloading and executing a second-stage payload.

Heuristics 8

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.
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` `3b13a24806f6e07df2350260326a3a54accfc674dca0d6ca7e92f51ef690bd4c`	pdf-javascript-stream	PDF /JS object 32 at offset 0xCDF	116 bytes
`javascript_obj0034_001.js` `827b8bf6ae90bb2519204f6aa758db383754fefcc432782f1895ef484ff95aaa`	pdf-javascript-stream	PDF /JS object 34 at offset 0xDA9	194 bytes
`javascript_obj0036_002.js` `a9e79f02fb8acc0c9d82b3460839af344a9d96277ee43ea69aa765602d5f6c09`	pdf-javascript-stream	PDF /JS object 36 at offset 0xF42	205 bytes
`javascript_obj0038_003.js` `3c3112250b49cf2f6ac15899cb528219409cc4d37e5b9710d29597ef75269bd1`	pdf-javascript-stream	PDF /JS object 38 at offset 0x1039	42 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0078_004.js` `13a72694f12e87e76f0e9c6c37a0de5f3f40bd3dcde9239f20c8c11b2ffa3ee5`	pdf-javascript-stream	PDF /JS object 78 at offset 0xE9A	35 bytes
`legacy_pdfkit_stage_000.js` `9e2c911db76e4b4ee735a773864bffb53eec733cc3fcb4e149a3e802b5f2e3b3`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x247	6448 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 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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