PDF malware analysis — malicious · 2642fd23df424c9a

MALICIOUS

PDF

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

MD5: 8c75d81f4832cc8f151002e31c519110 SHA-1: 0fa45963b8b62c6ed486148a9f307404827503cd SHA-256: 2642fd23df424c9aae9cd23bf26c4dbccc15516a7f4d1d56451e382063f86799

366 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 JavaScript

The PDF file contains multiple critical heuristic firings indicating exploitation of CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. These vulnerabilities are triggered by embedded JavaScript, which is further confirmed by the 'PDF_JAVASCRIPT' and 'PDF_JS' heuristics. The 'OpenAction' trigger suggests the JavaScript executes automatically upon opening the PDF. The extracted JavaScript, particularly 'numeric_charcode_stage_000.js', is likely responsible for downloading and executing a second-stage payload, as indicated by ClamAV detections on extracted artifacts.

Heuristics 10

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-22359 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-22359
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
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `a10a2132b3936f339832f5376b1bf67972eecd1b2dfab8386675e67df3f075a9`	pdf-javascript-stream	PDF /JS object 7 at offset 0x215	15358 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0007_001.js` `307c52f889779e104fcedde8af0f425b707a597b1fac6809da793b16ecd677f7`	pdf-javascript-stream	PDF /JS object 7 at offset 0x215	15176 bytes
`numeric_charcode_stage_000.js` `8c3345fc189b95d4b3ae4cf70d16c6950efcb567ed1d0a476ed72e16f855aed3`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x22D	4624 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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