PDF malware analysis — malicious · 9a395541f9ee0614

MALICIOUS

PDF

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

MD5: 1da34a3075969126ceec1410becbf758 SHA-1: d54776dd6d3dbfd31bdcb89b6759ea33665393e4 SHA-256: 9a395541f9ee0614e6573644e77760bd910937b827ef7e6814dd4dc60888c7fb

358 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious Link

Multiple critical heuristics indicate the exploitation of CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659 through embedded JavaScript. The ClamAV detection of 'Pdf.Dropper.Agent-7285784-0' and the detection of 'Js.Exploit.Shellcode-18' on an extracted artifact further confirm malicious intent. The JavaScript appears to be obfuscated and designed to download and execute a second-stage payload.

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: Pdf.Dropper.Agent-7285784-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7285784-0
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 0xD23	116 bytes
`javascript_obj0034_001.js` `827b8bf6ae90bb2519204f6aa758db383754fefcc432782f1895ef484ff95aaa`	pdf-javascript-stream	PDF /JS object 34 at offset 0xDED	194 bytes
`javascript_obj0036_002.js` `a9e79f02fb8acc0c9d82b3460839af344a9d96277ee43ea69aa765602d5f6c09`	pdf-javascript-stream	PDF /JS object 36 at offset 0xF86	205 bytes
`javascript_obj0038_003.js` `3c3112250b49cf2f6ac15899cb528219409cc4d37e5b9710d29597ef75269bd1`	pdf-javascript-stream	PDF /JS object 38 at offset 0x107D	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 0xEDE	35 bytes
`legacy_pdfkit_stage_000.js` `534071b685597d9ae99ab161a20fb92e661dc7108337eedd3af652fb1653f32c`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x247	6664 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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