PDF malware analysis — malicious · 5620c7b6833b6e1d

MALICIOUS

PDF

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

MD5: 076f5b30aa995070b8e24ce97e3ad845 SHA-1: d53b70a0cd3194bbb4e91e6e571dd0c94fab4b26 SHA-256: 5620c7b6833b6e1d8da30b607f72d70bdf2d51a57986a8ad2d3bcceeda5276f6

318 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-2009-4324, CVE-2009-0927, and CVE-2007-5659. These vulnerabilities are used to execute embedded JavaScript. ClamAV detections further classify this as a PDF dropper. The deobfuscated JavaScript (legacy_pdfkit_stage_000.js) likely downloads and executes a second-stage payload, although its exact behavior is obscured.

Heuristics 8

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)
ClamAV: Pdf.Dropper.Agent-7213089-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7213089-0
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.
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_obj0006_000.js` `903e617627349e9b298593cc97f7e5bb9e0236110d7ebfd1524a072a14e154f0`	pdf-javascript-stream	PDF /JS object 6 at offset 0xC2A	180 bytes
`javascript_obj0016_001.js` `f3ef22ef4cef156117d916fe87ba11d44ffc384448190d57f2498c0136ac85a2`	pdf-javascript-stream	PDF /JS object 16 at offset 0xD03	473 bytes
`javascript_obj0026_002.js` `d993cf565a2cc2d40d2c416cb3183ca57c66e67d505b960a00ef6984936d75b3`	pdf-javascript-stream	PDF /JS object 26 at offset 0xE7F	133 bytes
`legacy_pdfkit_stage_000.js` `dbc8ad90611d1526d3aca776d7afaeaa60622fb3a47e8d7a7094a3cf9317f49f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1E7	6376 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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