PDF / .TMP malware analysis — malicious · ed67bc0edc21e2c9

MALICIOUS

PDF / .TMP

153.5 KB

MD5: 39ddf5a096b8cc1ef1e25545053eeaba SHA-1: bc5b487bfbc2b6f2e37c48670ad38f260a811033 SHA-256: ed67bc0edc21e2c95629002935cddd6ff9df0d1b0d414205337d4a7c4c107d90

318 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

The PDF file contains multiple critical heuristic firings indicating exploitation of known Adobe Reader vulnerabilities, specifically CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659. These vulnerabilities are leveraged to execute embedded JavaScript. ClamAV detections further confirm its malicious nature, identifying it as 'Pdf.Exploit.Agent-36117' and associated extracted artifacts as 'Js.Exploit.Shellcode-18' and 'Pdf.Exploit.Agent-36307'. The embedded JavaScript is likely designed to download and execute a second-stage payload, a common technique for initial access and further system compromise.

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.Exploit.Agent-36117 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36117
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_obj0008_000.js` `dd25f4d312b8396677e86ba6904457c1fa59cd5048673976063a63a27ecc002a`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	2674 bytes
Detection ClamAV: Pdf.Exploit.Agent-36307 Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_000.js` `7845bddc318e8fd093c0057a8548d7a66acdc1b262353c56f1b10e10f2718d24`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xC8D	718 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `d82500187b66658db8f6304bd298d2c5fe1affab34e41db7bd69f485ffb5e6f3`	deobfuscated-js	double percent-decoded annotation JavaScript at offset 0xC8D	17097 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 10 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_002.js` `42025b552c7960b53abcd8cd732b01c8d109eccfdfefc352b9826c4d5807d414`	deobfuscated-js	cross-stage annotation API aliases at offset 0x1E7	81 bytes

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