PDF malware analysis — malicious · 47b521805dc9543f

MALICIOUS

PDF

22.6 KB Created: 2009-05-01 21:21:45 Authoring application: tvEeSFCPx (via NeTSnrx)

MD5: aa756abd428586d2ba62f764b070e405 SHA-1: 0579093aa2468daf3728551f422ab5c3dd50183f SHA-256: 47b521805dc9543f10f54f0088ce5ce78ae6fcd809edabf95a49dd443df65073

456 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

This PDF file is malicious, leveraging multiple critical vulnerabilities including CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. It contains embedded JavaScript that is obfuscated and uses eval() and unescape() functions. The primary intent appears to be the execution of arbitrary code via these exploits, likely leading to the download and execution of a second-stage payload, as indicated by the ClamAV detection on an extracted JavaScript artifact.

Heuristics 11

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-1704 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-1704
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.
OpenAction trigger high PDF_OPENACTION

PDF has an /OpenAction — code runs automatically when opened
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits
Suspicious extracted artifact medium 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.
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `1f334e247ed0d654c6cf1e7f81e880cb60bafae919c069ae59dd7d15ddc5220f`	pdf-javascript-stream	PDF /JS object 7 at offset 0x22D	21896 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 2 long hex-escaped blob(s).
`javascript_obj0007_001.js` `89da010c8ac172f0caefb7cee56702a31835bd811c14004a7eadcc11e42a453c`	pdf-javascript-stream	PDF /JS object 7 at offset 0x22D	19864 bytes
`numeric_charcode_stage_000.js` `7c25cf721a14f79ad30a9a7498e581ed8baf0cbebc00dd1c680d04d936267897`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x236	4643 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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