PDF malware analysis — malicious · 607423a47fc98fa9

MALICIOUS

PDF

38.9 KB Created: 2010-01-25 14:42:02 +03:00 Authoring application: comesOneWeb (via 296add4760393dc63707e407affcbc84)

MD5: a48ed7f850e9a61b844974851e9cad9a SHA-1: 5fb14dc2942a95e8406e56a85312c60bfe71a0c6 SHA-256: 607423a47fc98fa9b5e32814603677f6e28b8cfdb182e250721b2bb0d097cc17

224 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript that utilizes eval() and obfuscation techniques, strongly indicating malicious intent. Heuristics like 'PDF_JS_EXPLOIT_CLUSTER' and 'ML_NYX_PDF_MALICIOUS' further support this. The ClamAV detection 'Pdf.Dropper.Agent-1504663' suggests this file acts as a dropper for further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9899

Heuristics 8

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: Pdf.Dropper.Agent-1504663 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-1504663
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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.
ASCII85Decode filter (with exploit indicators) low PDF_FILTER_85

ASCII85 encoding filter present alongside exploit delivery indicators — uncommon outside of obfuscation
Optional Content Group with action trigger low PDF_OPTIONAL_CONTENT

Optional Content Group (layer) co-occurs with an action trigger — content can be selectively hidden from viewers or scanners while the action still fires on open
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_obj0024_000.js` `5e302fea483b353b553f99761660a7a1cf3582e68dca6ee03eda90c564b6ec09`	pdf-javascript-stream	PDF /JS object 24 at offset 0x2E52	37296 bytes
`javascript_obj0026_001.js` `69b8d2ed62180e70a1eda6075231352c1b4165f7c09dff1f0b3978e973a9abef`	pdf-javascript-stream	PDF /JS object 26 at offset 0x8FC7	1521 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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