PDF malware analysis — malicious · c6048c56c2063d51

MALICIOUS

PDF

3.5 KB

MD5: 5dfb5cb7b18903b4436c2563897c59ab SHA-1: 040fbd292b9084bdb5db82fa9345125814e95ea0 SHA-256: c6048c56c2063d5195d35092fed33d6e8260aa7414975402cf88e7e0986453cb

316 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1027 Obfuscated Files or Information

The PDF file contains obfuscated JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, PDF_EVAL, and PDF_UNESCAPE. Specifically, the critical firings for CVE-2009-0927 (Collab.getIcon) and CVE-2007-5659 (Collab.collectEmailInfo) suggest the exploitation of known vulnerabilities in Adobe Reader. The embedded JavaScript, particularly the deobfuscated version 'numeric_charcode_stage_000.js', is likely responsible for downloading and executing a secondary payload, a common technique for initial access.

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)
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)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
Suspicious extracted artifact high 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.
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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0004_000.js` `105323942dfd68480b5259666eac13fa550fc7495b1c06bb15c7aa17442e59c5`	pdf-javascript-stream	PDF /JS object 4 at offset 0x249	30154 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).
`numeric_charcode_stage_000.js` `d2aa1544171b27eb2948ab4853e486a09efe40398341a945b2ab279758d834fd`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x2B2	6767 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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