PDF malware analysis — malicious · e1ae863a0fbf33b0

MALICIOUS

PDF

7.7 KB Created: 2009-12-03 19:45:37 Authoring application: PDF Library 3.2.9 (via PDF Library 3.4.5)

MD5: 47835bc2cc3e165529f3ead2cfec7182 SHA-1: 61750362bafbe5e2d86739808f0c426f872ecca2 SHA-256: e1ae863a0fbf33b0e848c4464dd8d8aad546b55911e30da1a7d6a392a5aa7f77

376 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file exploits multiple known vulnerabilities including CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992, indicated by specific heuristic firings related to JavaScript actions and property aliases. The embedded JavaScript streams, particularly 'js_property_alias_stage_000.js', are identified as malicious by ClamAV and exhibit obfuscation techniques. The primary function of the embedded script appears to be the execution of a second-stage payload, leveraging the identified exploits.

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-6331 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-6331
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.
Suspicious extracted artifact high 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.
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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `ba29388f874ca8e92310573f3c35cf5f98cb2db45bc81800927a7cd491b4e46d`	pdf-javascript-stream	PDF /JS object 7 at offset 0x268	37689 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long hex-escaped blob(s).
`js_property_alias_stage_000.js` `a83a5bde8e285194fbaaa743f05e6d59053e9d0c262d6c774d1498f3e5dd39e9`	deobfuscated-js	JavaScript hex-escape property alias normalized stage at offset 0x268	9435 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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