PDF malware analysis — malicious · 65d5146d5c81afab

MALICIOUS

PDF

6.0 KB Created: 2008-09-24 19:47:56 Authoring application: Adobe

MD5: 0f53ebc4a8337f9945d34ca0ea532953 SHA-1: 240efd1c097a5a3ad27a6cc04a1171c098d8e0df SHA-256: 65d5146d5c81afab89e5da51bd6040e0306753cca51705d060c0298042aae32a

390 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains embedded JavaScript that leverages multiple known Adobe Reader vulnerabilities, specifically Collab.collectEmailInfo (CVE-2007-5659) and Collab.getIcon (CVE-2009-0927). The deobfuscated JavaScript in legacy_pdfkit_stage_000.js clearly contains a URL, http://usfederalbanks.org/mm/load.php?spl=pdf_exp, which is used to download a second-stage payload. This payload was detected by ClamAV as Js.Exploit.Shellcode-18.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 10

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)
Pidief-style multi-CVE JavaScript dispatcher critical CVE likely PDF_PIDIEF_MULTI_CVE_DISPATCH

A single JavaScript body branches on app.viewerVersion and invokes two or more of the canonical Reader sinks (Collab.collectEmailInfo, Collab.getIcon, util.printf with a field-width format string). This is the 2009-2010 Pidief.J multi-exploit landing template: a per-version dispatcher that fires the matching CVE chain for whichever Reader version opens the file.
Multi-CVE Adobe Reader JavaScript exploit kit critical PDF_ADOBE_READER_MULTI_CVE_JS_KIT

One recovered JavaScript stage contains multiple version-gated Adobe Reader exploit branches. This is stronger evidence than independent API keywords: the PDF is selecting old Reader vulnerabilities by viewer version and running heap-sprayed Acrobat JavaScript exploit paths.
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.
PDF JavaScript shellcode contains an embedded download URL high PDF_JS_SHELLCODE_DOWNLOAD_URL

Decoded PDF JavaScript shellcode contains a hardcoded http(s) URL stored as little-endian %uXXXX Unicode escapes. Reader exploit shellcode embeds the second-stage fetch URL this way and pulls it down with a urlmon/URLDownloadToFile-style download-and-execute (commodity downloader behaviour rather than a specific Acrobat CVE).
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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://usfederalbanks.org/mm/load.php?spl=pdf_exp

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `36099ccd7433994105c1cd864c1a5da61521a9bb94ca6f8e4b155e601a9a6a11`	pdf-javascript-stream	PDF /JS object 6 at offset 0x13C2	145 bytes
`javascript_obj0016_001.js` `a595e16001498ed72a37688c97350c1557b477b45ea64c648a0fbe84f734ebd6`	pdf-javascript-stream	PDF /JS object 16 at offset 0x1499	188 bytes
`legacy_pdfkit_stage_000.js` `50dd6167b413a6bf84fe5a8840feab5429b7afd192f424bd322e12950b8e552b`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1E7	4895 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).

Open this report in the interactive analyzer, or submit your own file for analysis.