PDF / .TMP malware analysis — malicious · 2a0789c20e6fee5d

MALICIOUS

PDF / .TMP

120.4 KB

MD5: 42d018e0e5c2366e15e3b20010fbad5e SHA-1: ea52c1018cd3e6f2d5f7ae4569e2d8c23186688b SHA-256: 2a0789c20e6fee5d342a6b5228e9401ac19966e87a2a2b006ce5d1dd2a755219

258 Risk Score

Malware Insights

MITRE ATT&CK

T1204.001 Malicious Link T1059.001 PowerShell

The PDF exploits multiple known vulnerabilities including CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992, all related to JavaScript execution within Adobe Reader. Heuristics indicate embedded JavaScript streams and extracted files that ClamAV identifies as Js.Exploit.Shellcode-18. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, a common technique for initial access.

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)
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 detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0008_000.js` `ac2f40183dc65255419fa62012c5eaf1bdc8046e830aa8bbcf64167e646d2ca6`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	2095 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_000.js` `15570452ef6774968e92ba683d7e2999f7e6d6f2635a0ae91675854727c1d47d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xA4A	6851 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `cabbe5eb575bf0c697f12af023d99889ae50be75d1dad551b475e3b5e755db80`	deobfuscated-js	double percent-decoded annotation JavaScript at offset 0xA4A	13381 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 9 eval/decoder/string-building token(s).

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