PDF malware analysis — malicious · 1f30cda532bd17c8

MALICIOUS

PDF

73.1 KB

MD5: f87d989775854559f12461bde3062890 SHA-1: b993461ad32488824621f512e9fcc4156b645b0e SHA-256: 1f30cda532bd17c86aee9d21d8b996797a5b778a0f2cc55bf1148d629575bbe7

226 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1071.001 Web Protocols

This PDF file contains obfuscated JavaScript that utilizes a binary-XOR stager. The critical CVE_2007_5659 heuristic indicates that the script exploits a known vulnerability in Adobe Reader to execute a secondary payload. The script's intent is to download and execute further malicious code, as evidenced by the 'binary_xor_stage_000.js' artifact.

Heuristics 8

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: Pdf.Dropper.Agent-7237222-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7237222-0
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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.
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_obj0004_000.js` `128bc8313d84802677bf7ddb036e7753587c23fb2d55022d5692a04e9ae97662`	pdf-javascript-stream	PDF /JS object 4 at offset 0xC0	74554 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 6 long base64-like blob(s).
`binary_xor_stage_000.js` `8d0c98331dc1e73c075e37ccdf48be86e6ec769456bae6130176687ebc5daf23`	deobfuscated-js	binary-XOR decoded JavaScript at offset 0x3D7	1207 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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