PDF malware analysis — malicious · db7438e3fc5652ba

MALICIOUS

PDF

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

MD5: 02955d304085e0f6eaa91eeee7e9b90f SHA-1: 930589839db6eb4646ae86b2a75221b050ee716b SHA-256: db7438e3fc5652bace3c31c58da620fd037f7f7d31954e034b10214b7b9786fd

358 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 through embedded JavaScript. The ClamAV detection of 'Pdf.Dropper.Agent-7312212-0' and the detection of 'Js.Exploit.Shellcode-18' on an extracted artifact further support its malicious nature. The embedded JavaScript, particularly the deobfuscated 'legacy_pdfkit_stage_000.js', is designed to execute exploits and likely download additional malicious content.

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)
ClamAV: Pdf.Dropper.Agent-7312212-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7312212-0
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.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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` `d20b82e9dbb241c152ae77eadce4d786b64b2713364a524ac780443777cbd014`	pdf-javascript-stream	PDF /JS object 6 at offset 0xBFC	81 bytes
`javascript_obj0016_001.js` `db08f16a568aed987126a48ded1951bf4f74f54e7c3c694c090a6cf44e6e2d03`	pdf-javascript-stream	PDF /JS object 16 at offset 0xC93	372 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0026_002.js` `fe7f1b8b0b50429186d1a976d5bb1516abdf961185f12455da3e61b6508d182c`	pdf-javascript-stream	PDF /JS object 26 at offset 0xDDE	106 bytes
`legacy_pdfkit_stage_000.js` `10ea963ecd9f26b09fdfb4fb4a2555b9b0d1bceddc438369d084dffefd0809b1`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1BB	6411 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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