PDF malware analysis — malicious · a072d0c9202e712c

MALICIOUS

PDF

2.5 KB

MD5: 8f8c19d6a1cba107d6d4552cd89f251a SHA-1: 06be1d3de6821812791bf660ae5251b973e321ac SHA-256: a072d0c9202e712c5e04621a970fd729a1bca99ba61a02855695445aed029fff

218 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that utilizes the 'Collab.getIcon' and 'Collab.collectEmailInfo' methods, indicating exploitation of CVE-2009-0927 and CVE-2007-5659 respectively. The JavaScript is obfuscated using 'eval()' and 'unescape()' and is likely designed to download and execute a second-stage payload. The presence of these specific CVEs and the obfuscated JavaScript strongly suggests a malicious intent to compromise the user's system.

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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`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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