PDF malware analysis — malicious · fd7d55e447f3d88c

MALICIOUS

PDF

4.1 KB Created: 2009-09-03 19:46:83 Authoring application: Eblasha 10.7.6.3 (via PDF Library 6.6.1.3)

MD5: 67b4eaf0c10c4de37e094a6e7d09c8dc SHA-1: d5059f73c7b5449d76e0ae3d9d58f5accd58d9db SHA-256: fd7d55e447f3d88c30848c35dd2bb701036570b3da85a4b26e1d155559264b39

364 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains multiple critical heuristic firings indicating exploitation of CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992 through embedded JavaScript. ClamAV detected the file as Pdf.Dropper.Agent-7685839-0, and a suspicious extracted JavaScript artifact was also flagged by ClamAV as Js.Exploit.Shellcode-18. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload.

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.Dropper.Agent-7685839-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7685839-0
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.
Suspicious extracted artifact high 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.
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.
ASCII85Decode filter (with exploit indicators) low PDF_FILTER_85

ASCII85 encoding filter present alongside exploit delivery indicators — uncommon outside of obfuscation

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_000.js` `09c08560c4b674c1882c6862f683d1082fd3bb8084f3946f92e7ffe19757c32e`	pdf-javascript-stream	PDF /JS object 13 at offset 0x37C	17074 bytes
`numeric_charcode_stage_000.js` `1bb2f1b9e4a6cca105ac935796c3624c7b01edf8f8c1925b7a6c44d80853f248`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x3C9	5136 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 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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