PDF malware analysis — malicious · bb87da402f3647f4

MALICIOUS

PDF

7.7 KB Created: 2009-12-03 19:41:17 Authoring application: PDF Library 7.8.9 (via PDF Library 9.9.7)

MD5: 4a2be598698b13da927088f9a2ae8ea6 SHA-1: 9b0b4632fb2a0e06d071a9f14e957c2435fe8cc6 SHA-256: bb87da402f3647f41a7034a70162a6b57a316a8825aedda3e0dbfca00fa94b00

376 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that leverages multiple known vulnerabilities (CVE-2009-0927, CVE-2007-5659, CVE-2008-2992) to execute arbitrary code. The heuristics indicate that the JavaScript is obfuscated and uses hex-escape encoding, a common technique for evading detection. The extracted JavaScript artifact was also flagged as suspicious, containing exploit shellcode. This suggests the file is designed to download and execute a second-stage payload.

Heuristics 9

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)
util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992

PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (identified after JavaScript deobfuscation)
ClamAV: Pdf.Exploit.Agent-6363 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-6363
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.
Suspicious extracted artifact high 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.
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `32c611b32f7de24aed7fa310fd9035be46add4f113d1182fc461bc5a20230aed`	pdf-javascript-stream	PDF /JS object 7 at offset 0x268	37665 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long hex-escaped blob(s).
`js_property_alias_stage_000.js` `0f0c26cc81ceeec7c4baa42b1ca6be03ab9b371b9cde1190f9fb04997f9dd38a`	deobfuscated-js	JavaScript hex-escape property alias normalized stage at offset 0x268	9429 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 9 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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