PDF malware analysis — malicious · 1bd0d4505447952a

MALICIOUS

PDF

21.7 KB

MD5: 487270aa7a679e29ce7598adf1085cb7 SHA-1: 4d4b1b48f2d7be73ecde57182556e906b758761a SHA-256: 1bd0d4505447952aaf47386664c4e71c4d94cf33297e86548646e81e3458201e

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

The PDF sample contains multiple embedded JavaScript streams, with a critical heuristic firing for CVE-2009-0927 (Collab.getIcon). The JavaScript utilizes eval() and unescape() functions, indicating obfuscation to hide malicious code. The deobfuscated JavaScript suggests the primary intent is to download and execute a second-stage payload, characteristic of exploit kit delivery mechanisms.

Heuristics 5

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)
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111711_000.js` `1ff276279b0911fd2ede292818f868a54e635928443f19ee5486b8abf3c619fc`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3078 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).
`javascript_obj111712_001.js` `12f15d215adb3ffdc1f2337aa233d7970a71dbabf14b2540d1e1ee64eb205252`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xDCA	16826 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).
`javascript_obj111713_002.js` `8492ef17b48f30e227b4278d7976bae1765a74e6ce383fe7b029ca14fe9bb416`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x4FBA	1758 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 4 long base64-like blob(s).
`legacy_pdfkit_stage_000.js` `a7bf9e8f3472d8e456111af54d3cbfd9bd06c7e59489254ed4481e1c4d057ace`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xDCA	1520 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `5b737fbc81607e4418714446ed1de02b317b397c752de353bb5a1804fa799e60`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x4FBA	106 bytes
`legacy_pdfkit_stage_002.js` `bb50a34e10c0f6d5c3be4076db6ff98b2e4b51a5112798b62e136e8c79f53fd7`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xDCA	1627 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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