PDF malware analysis — malicious · 9b283fefe08b1128

MALICIOUS

PDF

2.2 KB

MD5: 05b7837428eaa5c89912a3bfb4202e63 SHA-1: a02b8d58d7bfe430de9a93fdc5bd754f16615afd SHA-256: 9b283fefe08b1128eee05a98db941117a486e7c5223f164e29386c0d0a205703

278 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

This PDF document contains embedded JavaScript that is triggered by the OpenAction feature. The JavaScript utilizes eval() and exploits CVE-2009-0927 (Collab.getIcon) and CVE-2008-2992 (util.printf) to execute arbitrary code. The embedded artifact was detected by ClamAV as Pdf.Exploit.Agent-35646, indicating it likely downloads and executes 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` `4ab81fd834b82106178d1391a1ebfc875589af739f5bc79e10074058172a4908`	pdf-javascript-stream	PDF /JS object 9 at offset 0xBC	15987 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` `db2ef85203a1549190f0bcc388578f130f2b8608c4713d39d2b1ef2cd6ae35cc`	deobfuscated-js	split-join delimiter stripped JavaScript at offset 0xF6	5749 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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