PDF malware analysis — malicious · e1c2d54130db826d

MALICIOUS

PDF

12.2 KB

MD5: b6499d103a68ee8e266c01ddb238e861 SHA-1: b7677fd92f05e94d25acba272c75aac97d6d07b1 SHA-256: e1c2d54130db826db30212ffcce3b29b4d3d5c8e7fe324e56a2bd36db5e5a8db

378 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.001 Malicious Link/Object T1204.002 Malicious File

The PDF file contains embedded JavaScript that is heavily obfuscated and designed to exploit multiple Adobe Reader vulnerabilities. The primary mechanism involves decoding a numeric array and executing it, as indicated by the critical heuristic firings for CVE-2009-4324, CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. ClamAV also detected this as Js.Exploit.HTML-28, confirming its malicious nature. The script's intent is to leverage these vulnerabilities to 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)
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: Js.Exploit.HTML-28 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Js.Exploit.HTML-28
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.
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0076_000.js` `a866db4fc1451d2099ac364f9276aeee67820c5ed021fcc99cd29771df1c7ad8`	pdf-javascript-stream	PDF /JS object 76 at offset 0x2C2	11534 bytes
Detection ClamAV: Js.Exploit.HTML-28 Obfuscation or payload: unlikely
`split_char_table_stage_000.js` `2a33a5a6609c908e8bf18151bb09556047b2fb2aeba23cf99ca99df0b6e0eb2b`	deobfuscated-js	split character-table join decoded JavaScript at offset 0x2D1	3858 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 11 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

Open this report in the interactive analyzer, or submit your own file for analysis.