PDF malware analysis — malicious · 9c51ab025c14143c

MALICIOUS

PDF

132.5 KB

MD5: ee0f3eaa455497f067dd1404ede0be55 SHA-1: 00c2186b67b1d07173cd270023b1f5916bcf6153 SHA-256: 9c51ab025c14143c59569c464da2e8d682c80736d7f1f109db0a3d8fd4e498cd

258 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that exploits CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992 using functions like Collab.getIcon, Collab.collectEmailInfo, and util.printf. The heuristic firings indicate that this JavaScript is used to launch external URLs, likely to download and execute a second-stage payload. An extracted artifact was detected by ClamAV as Js.Exploit.Shellcode-18, further supporting the malicious nature of the embedded script.

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` `034c476e9f85c873714b19f693dc313cfd9fce7fafea43e6b4f47ace626e532d`	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` `633c142224c830d5c913e7ffb4af5acd42f9b4c4b5f77c7c7db0f45e3dd8f4a9`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xA4A	14745 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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