PDF malware analysis — malicious · 7b91cb1cbf54f515

MALICIOUS

PDF

43.9 KB

MD5: 056a6d03c98275c95a861d62aeb878ab SHA-1: b3fdc3af49387510903a935a11a4503f83ffe955 SHA-256: 7b91cb1cbf54f515c654a3701754ac26751dc1964f13ed5336c263526b69f794

150 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains JavaScript that leverages the CVE-2007-5659 vulnerability to execute arbitrary code. This script is designed to download a second-stage payload from the URL http://rytsedwtov.in/new/post.php?e=5&&. The ML classifier strongly indicates maliciousness, and the embedded URL is a high-priority indicator.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

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 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://rytsedwtov.in/new/post.php?e=5&&

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0008_000.js` `a7c9640cba8e5781e250a7d19decd8ff3bfa0760bde45a535beb3b3d43e28233`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	1177 bytes
`legacy_pdfkit_stage_000.js` `84cbeb5038a28a60bd38c78435ffb621cd7cb1e415ab0e011378eeb463dd7248`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x6B4	2862 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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