PDF malware analysis — malicious · de30bec3ed323120

MALICIOUS

PDF

2.3 KB

MD5: 9e90a30f9702d4e5424b0e85a8a54204 SHA-1: 1680bbf8bea3893e2fdadb5ef080043a9690f591 SHA-256: de30bec3ed3231205c7ced4b633f4df39f81e30f43735892336a5d1a9f1467c5

278 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file contains embedded JavaScript that leverages CVE-2009-0927 (Collab.getIcon) and CVE-2008-2992 (util.printf) to execute code. The OpenAction trigger and eval() calls indicate the script is designed to run automatically upon opening. The extracted artifact was detected by ClamAV as Pdf.Exploit.Agent-35646, suggesting it's a known exploit. The script's likely intent is to download and execute a second-stage payload.

Heuristics 8

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)
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
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0009_000.js` `9965c061a7b9e2e4304f7aece3e46975ff0efdbd54cebff3e89f646a0c237c09`	pdf-javascript-stream	PDF /JS object 9 at offset 0xBC	21124 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `769c2c97f2b32adca492f925ea96933e78b05971825448080a8c37b676e88d4e`	deobfuscated-js	split-join delimiter stripped JavaScript at offset 0x101	5767 bytes
Detection ClamAV: Pdf.Exploit.Agent-35646 Obfuscation or payload: likely Carved artifact contains 11 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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