PDF malware analysis — malicious · 876a2685ad957d27

MALICIOUS

PDF

6.9 KB Authoring application: iText 2.1.7 by 1T3XT

MD5: 9da683782e5083e7b1c23b91854f19b7 SHA-1: 7f5a61f7f9f40d0cb69f8456b5bda7bc649ba27d SHA-256: 876a2685ad957d27e9687ef96dceb1e5291568858dacafe5a9bcd23262e7278f

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The critical CVE_2009_0927 heuristic specifically points to the use of the Collab.getIcon method, a known exploit vector. The unescape() call and ASCIIHexDecode filter further suggest obfuscation and exploitation. The primary attack vector appears to be the exploitation of CVE-2009-0927 to achieve arbitrary JavaScript execution.

Heuristics 6

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. (matched in decompressed stream)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `ae4ae434ee75eb7241a0966782beb9327bc0db88a8858759c80d966ab3e25076`	pdf-javascript-stream	PDF /JS object 6 at offset 0x13C	5829 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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