PDF / .PHP malware analysis — malicious · bb80652e69ca7a66

MALICIOUS

PDF / .PHP

16.0 KB

MD5: a1356ca074238c253e062f4274d1ef75 SHA-1: b4986bf57169a80413c015b191566bfd27172be1 SHA-256: bb80652e69ca7a6625c5bc9d7c97bdef7c7cb2a70f0ca6085a7c9a11d0fb6a9b

188 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious Link T1059.001 PowerShell T1059.003 Windows Command and Shell

The PDF file contains embedded JavaScript that is obfuscated using binary-XOR encoding. This script targets CVE-2007-5659 (Collab.collectEmailInfo) to exploit Adobe Reader. The primary function of the script is to download and execute a second-stage payload, as indicated by the 'PDF_BINARY_XOR_JS_STAGER' and 'CVE_2007_5659' heuristic firings. The ClamAV detection further confirms its malicious nature.

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.Exploit.Agent-14173 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-14173
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)
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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` `88136a2372eb5e62506cbb566203374c7f407e3cdfc69ca273c169fcf07afef6`	pdf-javascript-stream	PDF /JS object 49 at offset 0xA	79708 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` `000a9df8d8ad61a604a23653f7e52c30bd502e4f597c529427fdb2ab52f08e24`	deobfuscated-js	binary-XOR decoded JavaScript at offset 0x3F8	1336 bytes

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