PDF malware analysis — malicious · bba127ca9756a9f6

MALICIOUS

PDF

17.9 KB

MD5: 21d9d28195bca2b6ac49cdf6f02ba5c9 SHA-1: fd91d2f4fb4e23f1341449f5cabbb951b9fa3954 SHA-256: bba127ca9756a9f69f805a0873be0d3ed7b2becce0cc8e2ca9d2b7fe7f68cc84

300 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains obfuscated JavaScript that leverages multiple known Adobe Reader vulnerabilities (CVE-2009-0927, CVE-2007-5659, CVE-2008-2992) to achieve code execution. The embedded JavaScript likely downloads and executes a second-stage payload, indicated by the presence of multiple extracted JavaScript files and the use of eval().

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)
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: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `f988671e4e03705737c01b31b255619c8c5095fa9c0a6521db5841de25343344`	pdf-javascript-stream	PDF /JS object 6 at offset 0x198	68499 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).
`legacy_pdfkit_stage_000.js` `fb4b25c0aa3548506c4db6ea7dcc3067f0d38542abe3bb7890a3d894c473a1f9`	deobfuscated-js	double percent-decoded annotation JavaScript at offset 0x198	66363 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 144 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `6d6f335eb422f394b425b42f4a6a13bc25c38c37c6d3d29e38463a9f2fcd2316`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x198	5219 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 9 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_002.js` `3c3dcd74f5f29e39c2639ddcb13afc6389d0d85e93c314680d8ccbed8b1c4e53`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0x198	10439 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 18 eval/decoder/string-building token(s). Carved artifact contains 2 long base64-like blob(s).

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