PDF malware analysis — malicious · 273704f1977b27b4

MALICIOUS

PDF

2.6 KB

MD5: 2392830167efe98f9a0b2ff53b4f070a SHA-1: 4ac346ef7fd0a19220861e63d85e126963003616 SHA-256: 273704f1977b27b43f3feb9d807c37968b5561f5a552138463f96c4c1b634ae1

218 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF file exploits CVE-2009-0927 and CVE-2007-5659 vulnerabilities using embedded JavaScript. The JavaScript employs eval() and unescape() functions, indicating an attempt to obfuscate malicious code. The primary goal appears to be the execution of a second-stage payload, as suggested by the heuristic firings related to exploit execution and suspicious script content. No specific malware family could be confidently identified.

Heuristics 7

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)
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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_obj111611_000.js` `3be90f75bb8720f31a599d4f91a121b5ce52af947b3ecceb8f755dd6166378ba`	pdf-javascript-stream	PDF /JS object 111611 at offset 0x994	87 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `e9ea9667fb78771e05f0b31f617abddef0b403120a01a49ea37055503bdf3428`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x189	4724 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).

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