PDF malware analysis — malicious · 6a28cf04dfe09804

MALICIOUS

PDF

4.1 KB Created: 2010-01-35 62:12:26 Authoring application: Adobe

MD5: c981fe5e54b411c8dc8e883daa28eb17 SHA-1: 7c339c6f73a7a596d6608806c6bcbfce9f1b4eed SHA-256: 6a28cf04dfe098045d1fb39758e64c80142829948e1ec2eb9670ba4abed2fe5f

408 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains embedded JavaScript that exploits multiple known Adobe Reader vulnerabilities, including CVE-2007-5659, CVE-2009-4324, and CVE-2009-0927. The deobfuscated JavaScript indicates it attempts to download and execute a second-stage payload, as evidenced by the ClamAV detection 'Js.Exploit.Shellcode-18'. The specific vulnerabilities targeted and the shellcode extraction strongly suggest a malicious intent to compromise the user's system.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 9

media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324

PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009. (identified after JavaScript deobfuscation)
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.
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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0032_000.js` `7f49ca01d7344e1fe66c86c4b8c80a3e9499f039adf8646504b00505751e9112`	pdf-javascript-stream	PDF /JS object 32 at offset 0x2AA	183 bytes
`javascript_obj0034_001.js` `0040118444a77a08bd5b89fca8b51786b708d8d50ec9e54509c72cc1c4753889`	pdf-javascript-stream	PDF /JS object 34 at offset 0x126	129 bytes
`javascript_obj0036_002.js` `eb3e62090dcb7598e8ee05ded48b5f9d264dcc0bb7bdf744d261e5a94f0035a4`	pdf-javascript-stream	PDF /JS object 36 at offset 0xDA2	188 bytes
`legacy_pdfkit_stage_000.js` `69bfcb2ccd6dc70f77f811451472607a14c2497da2417717e0895d6e050a3261`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x3C5	6034 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 12 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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