PDF malware analysis — malicious · e28c3e65e8b30ab5

MALICIOUS

PDF

12.8 KB

MD5: 02f84a20ee8012edb96723f537eaafd8 SHA-1: d8f1f1662d66f48bc5a1eced6ffbb1e8eba1775c SHA-256: e28c3e65e8b30ab5ea80430e2bd60e3e5f2fdd5c79549294644b9251b7f4bc0c

186 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains obfuscated JavaScript that exploits CVE-2007-5659, specifically targeting the Collab.collectEmailInfo function in Adobe Reader. The heuristic 'PDF_BINARY_XOR_JS_STAGER' indicates that the JavaScript is further obfuscated using binary XOR, and upon deobfuscation, it reveals a stager designed to download and execute a second-stage payload. The presence of 'ObfuscatedNameObject' in ClamAV detection further supports the malicious nature and obfuscation techniques used.

Heuristics 7

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: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
Binary-XOR JavaScript stager high PDF_BINARY_XOR_JS_STAGER

PDF JavaScript stores viewer-version payload branches as long binary digit strings, XORs each bit pair, converts 8-bit chunks with String.fromCharCode, and evals the recovered exploit stage.
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. (matched inside decoded stream)
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_obj0049_000.js` `64fa567fbc601f04a1e8539e46ba2bc6f456eb66c75d8329cfa2c22585c27470`	pdf-javascript-stream	PDF /JS object 49 at offset 0xA	75388 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 6 long base64-like blob(s).
`binary_xor_stage_000.js` `b1f1254346e4d87a8c5eb2d86dd561d15baee1a1e3ab14bc7f4970500a305dd2`	deobfuscated-js	binary-XOR decoded JavaScript at offset 0x3F8	1246 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.