PDF malware analysis — malicious · ea5ceef6d99085b5

MALICIOUS

PDF

7.4 KB Authoring application: Viraciregavi

MD5: a93639b600d88a91bbe30aa56be82f10 SHA-1: 57b32138adf2ac438c240aa5cb6f41656a674713 SHA-256: ea5ceef6d99085b599fae842ce6f94dc02deecc9404a27b2a41b4dabb28556ba

338 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file contains embedded JavaScript that utilizes multiple known exploits targeting PDF readers, specifically Collab.getIcon, Collab.collectEmailInfo, and util.printf. The presence of these CVEs and the 'HeapSprayHeuristic' detection strongly indicate malicious intent, likely to download and execute a secondary payload. The document body text appears to be nonsensical filler, further suggesting the primary purpose is exploitation rather than content delivery.

Heuristics 9

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: Pdf.Tool.HeapSprayHeuristic-6301967-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Tool.HeapSprayHeuristic-6301967-1
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_obj0009_000.js` `51f74cf8b197a81f2f762664951271628133fc197e16aa4308c291ce2eec7526`	pdf-javascript-stream	PDF /JS object 9 at offset 0x565	5724 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 11 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `1e0c8ca4c6180400afd62497a161d41969b04e1091a2d4ffa9764c7f00cf51a1`	deobfuscated-js	string-concatenation normalized Acrobat API aliases at offset 0x565	851 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 long base64-like blob(s).

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