PDF malware analysis — malicious · f6544b6b81524de1

MALICIOUS

PDF

7.4 KB Created: 2009-01-35 62:12:26 Authoring application: Adobe

MD5: 20cff74fb48c1c0c909e82094657ad6f SHA-1: 0a8f768673ae08766fa304a7b25c616b4f41d1c0 SHA-256: f6544b6b81524de16270a94fdb257f06e1d9a8a9353c38048447e204eb57c539

340 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 leveraged through embedded and obfuscated JavaScript, including the use of eval() and unescape() functions. The ClamAV detection of 'Pdf.Dropper.Agent-7324705-0' further confirms its malicious nature. The script's likely intent is to download and execute a second-stage payload, typical of a dropper.

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-7324705-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7324705-0
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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 8

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0032_000.js` `6f9a754a5453006dc979b1bb2b200d6b20f23ad4b5245e1965e1d94c177c5fad`	pdf-javascript-stream	PDF /JS object 32 at offset 0x42D	136 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0034_001.js` `290d554a402e27e945db732f8a142e5a7fdf358fa5d6901a9fe75519f15d804b`	pdf-javascript-stream	PDF /JS object 34 at offset 0x4EF	145 bytes
`javascript_obj0036_002.js` `b43a09da481bbb34b325afdda0964203a81635bf31127f00042dd74fee0e0a4f`	pdf-javascript-stream	PDF /JS object 36 at offset 0x10D	168 bytes
`javascript_obj0038_003.js` `053be959373fd7f94b30022193db65e876f848d37e00f09a01392aed58f521be`	pdf-javascript-stream	PDF /JS object 38 at offset 0xC60	186 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0078_004.js` `5a34ba75271cf9c7a3c606c5e9c7ecf14ac499dddc3ef54ded13b5f32ff877d3`	pdf-javascript-stream	PDF /JS object 78 at offset 0x7C	51 bytes
`legacy_pdfkit_stage_000.js` `559eff895c4ec524ed43d204c1edba9ffc2d52421c05fba281fc963c52ddf127`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x5EB	1634 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `285acda0c6268d6697bdc7a17cec6ea6311a36556e3f035c08a3cc885375d479`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xDA3	1800 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_002.js` `5ddd42654bbdcd253cb41032d0815c76f7572a5b33a22110ab91a1d8484a5fb2`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x140F	2938 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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