PDF malware analysis — malicious · e26660ca13760c1e

MALICIOUS

PDF

75.7 KB Created: 2010-01-04 19:41:57 Authoring application: PDF Library 2.5.4 (via PDF Library 2.2.2)

MD5: e6be456bfcddb1d2433ff1ff95dba987 SHA-1: 3c262218d73f4fad1b5fb18fa1bcad1ac1e9a099 SHA-256: e26660ca13760c1ee82e7539afdd4afc2426e9988b5a3bcb376646d2119e16e9

338 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF exploits multiple critical vulnerabilities including CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992, indicating it's designed to deliver a second-stage payload. The embedded and deobfuscated JavaScript, named 'legacy_pdfkit_stage_000.js', likely contains the malicious code responsible for this delivery. ClamAV detections further confirm its malicious nature, identifying it as Pdf.Exploit.Agent-36110 and Js.Exploit.Shellcode-18.

Heuristics 9

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)
util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992

PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (identified after JavaScript deobfuscation)
ClamAV: Pdf.Exploit.Agent-36110 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36110
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.
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `8e8122f1b8dec1fbc0dae512e6b3c3f1efb2b727d2454c1cff5ae0838ad0a139`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	38247 bytes
`legacy_pdfkit_stage_000.js` `ef83293d99d8f3cf1da23297a30d9b815d2d3dc39130e0b371df726095a048f8`	deobfuscated-js	numeric array subtract-key decoded JavaScript at offset 0x1A5	10024 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 9 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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