PDF malware analysis — malicious · 48b1fb1f6f34b561

MALICIOUS

PDF

22.7 KB Created: 2009-05-01 21:21:45 Authoring application: tvEeSFCPx (via NeTSnrx)

MD5: 5d0d74c967bf4b829e9487a5849a29fa SHA-1: a68f8088a0735afab8d684bed50ff32d3a58555a SHA-256: 48b1fb1f6f34b561a924222bb3c659fb63df1fcc73e33ee50ec727395d1d26ee

356 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1059 Command and Scripting Interpreter T1059.001 PowerShell T1059.007 JavaScript

This PDF document is malicious, leveraging multiple critical vulnerabilities including CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. These exploits are triggered via an OpenAction and embedded JavaScript, which is heavily obfuscated using String.fromCharCode. The embedded JavaScript is designed to download and execute a second-stage payload, as indicated by the ClamAV detection of 'Win.Trojan.Agent-36168' on an extracted artifact.

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 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.
OpenAction trigger high PDF_OPENACTION

PDF has an /OpenAction — code runs automatically when opened
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.
String.fromCharCode medium PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `3d6619afa55f5eb7be76978df0e0b88341598313ac7fabca622d92cf859ba6fb`	pdf-javascript-stream	PDF /JS object 7 at offset 0x215	22020 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`javascript_obj0007_001.js` `531556eb0a16175714f2374e07a802aaaf5e28ab5dc7ef476e25b299783d14d8`	pdf-javascript-stream	PDF /JS object 7 at offset 0x215	21838 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`numeric_charcode_stage_000.js` `35c105e1cedf19e7a80a075c7f368d55600c76b1a9d73fbcf06e4f2701b13160`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x22F	6733 bytes
Detection ClamAV: Win.Trojan.Agent-36168 Obfuscation or payload: likely Carved artifact contains 7 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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