PDF malware analysis — malicious · b330c5bb77f04699

MALICIOUS

PDF

4.1 KB Created: 2009-09-03 19:42:16 Authoring application: Eblasha 1.6.4.4 (via PDF Library 1.3.3.6)

MD5: cbef99b5313fcba8dba35b303af734ee SHA-1: 8ddc5b890fd263976f129454aa7df2a9f0067257 SHA-256: b330c5bb77f04699772c2b6534ad526d8387a921e81bb3db7283309e939896e8

326 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The file is a PDF containing multiple critical heuristic firings related to known PDF exploits (CVE-2009-0927, CVE-2007-5659, CVE-2008-2992). These exploits target the PDF viewer's JavaScript engine. An embedded JavaScript file, 'numeric_charcode_stage_000.js', was extracted and identified as a suspicious artifact, likely containing shellcode. This suggests the PDF is designed to exploit these vulnerabilities to execute arbitrary code, leading to the download and execution of a secondary malicious 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.Dropper.Agent-7685818-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7685818-0
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.
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.
ASCII85Decode filter (with exploit indicators) low PDF_FILTER_85

ASCII85 encoding filter present alongside exploit delivery indicators — uncommon outside of obfuscation
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_obj0013_000.js` `6c11bfb6aa30fd97f31feb2c8343a155f85080948085e3c4f9b592780ecb1624`	pdf-javascript-stream	PDF /JS object 13 at offset 0x37C	16960 bytes
`numeric_charcode_stage_000.js` `d73f0b2d026b3a7eed705d88c5cad8b1081c8d447d4ed03da2dfd05ec297906d`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x3C9	5100 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).

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