PDF / .PHP malware analysis — malicious · 845ab879def960e5

MALICIOUS

PDF / .PHP

7.3 KB

MD5: 296a7f38c5867732ad9773888739324c SHA-1: 0d427fa00e27e03155e766d6c14de1dead0ac926 SHA-256: 845ab879def960e51e1f8e434e25e34c468c96520b0e591070c605085f7378be

370 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains obfuscated JavaScript that leverages the Collab.collectEmailInfo method to exploit CVE-2007-5659. This script is designed to download a second-stage payload from the URL http://www.kanal7.com/kanal/.s/.l.php?l=1&spl=pdf_collab_email. The presence of multiple heuristic firings related to JavaScript exploits and shellcode download URLs strongly indicates malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 10

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)
PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
PDF JavaScript shellcode contains an embedded download URL high PDF_JS_SHELLCODE_DOWNLOAD_URL

Decoded PDF JavaScript shellcode contains a hardcoded http(s) URL stored as little-endian %uXXXX Unicode escapes. Reader exploit shellcode embeds the second-stage fetch URL this way and pulls it down with a urlmon/URLDownloadToFile-style download-and-execute (commodity downloader behaviour rather than a specific Acrobat CVE).
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.
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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://www.kanal7.com/kanal/.s/.l.php?l=1&spl=pdf_collab_email

Extracted artifacts 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111711_000.js` `0d29a3cfe19816abb215d1da0f392a53a3696dd5dcf2eb68f17b919255ef6000`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	4223 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 4 long base64-like blob(s).
`javascript_obj111712_001.js` `bb721a9d34fe880e026736bfb8855b3932680359390397f0258debbd8a323446`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x7B6	17210 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).
`javascript_obj111713_002.js` `9995edfaee2f40c9fdcb81c54e4fc1b9ff3b6aa510bf6d9c4247cb91341d0b1a`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x190E	1369 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).
`legacy_pdfkit_stage_000.js` `30da222368369eb91a52adba0b4867aecd5d7e948f448e4215bb561ec0fe6292`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x7B6	1461 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `45f33a2b6011dbedaffbca7d7ed47c6f494a02676d7ebb603cee90d70a37c9b2`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x190E	79 bytes
`legacy_pdfkit_stage_002.js` `e4d762656823dbbd6b77cd83b28fe5b3d7168557350ea47cd48cc0e693c2e209`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0x7B6	3083 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).

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