PDF malware analysis — malicious · 80f5fede4f616b0e

MALICIOUS

PDF

13.3 KB

MD5: a1bb3eedfa8b744611ad4358ae2dd287 SHA-1: 0c1dd01de8f947abb9410704a021402796643f8f SHA-256: 80f5fede4f616b0ed2c54b4a14a70358df3fbecc9ee8feb7e1edbdbd27eeb11a

186 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains a critical heuristic indicating the use of CVE-2007-5659 (Collab.collectEmailInfo) via a binary-XOR decoded JavaScript stager. This stager is designed to exploit the vulnerability in Adobe Reader, likely to download and execute a secondary payload. The presence of embedded JavaScript and the specific exploit detection strongly suggest a malicious dropper.

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: Pdf.Dropper.Agent-5343181-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-5343181-0
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` `fc2b4da03a285ee8bf14e7764297bd6a3ceb8c2be7e60a89e4ac152b7071926c`	pdf-javascript-stream	PDF /JS object 49 at offset 0xA	78664 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` `ac0762771bf8469c918e162654a51eadf5f556cbc40311acb226c954c52de83a`	deobfuscated-js	binary-XOR decoded JavaScript at offset 0x464	1312 bytes

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