PDF malware analysis — malicious · ff4c6628a90b15fe

MALICIOUS

PDF

132.2 KB

MD5: bf2d0b6aac5bd59576f0644949528fc9 SHA-1: 03f05a28ca628a388b6c9e1845b280937f45e94a SHA-256: ff4c6628a90b15feb0088d03f2dcbf24c8108be264e60567c7504ab25a60c7e1

258 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Shell T1204.001 Malicious Link/Script

The PDF file contains embedded JavaScript that leverages multiple known vulnerabilities (CVE-2009-0927, CVE-2007-5659, CVE-2008-2992) related to Adobe Reader's JavaScript engine. The heuristics indicate that the PDF launcher concatenates info fields, extracts characters at a fixed stride, and evaluates the result, which is a common technique for exploiting these CVEs. An extracted artifact was also flagged by ClamAV as Js.Exploit.Shellcode-18, further supporting the exploit-based nature of this file.

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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0008_000.js` `e099abc8401847bff565c82cc63765437258d724f9a443d3a601bd43a49d7df7`	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` `199e24f29fa10244db70067fda3cb368fec7e30c8af511e529c730531d482e8d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xA4A	14721 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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