PDF static analysis report

Static analysis result for SHA-256 44360a30a62c1307…

SUSPICIOUS

PDF

195.7 KB Created: 2008-05-20 16:36:51 -07:00 Authoring application: Adobe Illustrator CS3 (via Adobe PDF library 8.00) First seen: 2014-06-27
MD5: e3ef45b6e2fb4e63429469d3834e28bb SHA-1: 216eea432afec7a9fea04c34d9368c018d84d516 SHA-256: 44360a30a62c13074ab6ae2b844fe4a406400a96b2b36f2d3093f8dfe2f83121
50 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file was flagged as malicious by an ML classifier with high confidence. Heuristics indicate the presence of embedded JavaScript, specifically within streams and actions. While the document body is heavily obfuscated and unreadable, the embedded JavaScript artifacts (javascript_obj0079_000.js, javascript_obj0092_001.js, javascript_obj0084_002.js) suggest an attempt to execute code. The likely intent of this script is to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 4

  • JavaScript action low 1 related finding 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.w3.org/1999/02/22-rdf-syntax-ns# In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/g/img/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#In PDF document text
    • http://ns.adobe.com/illustrator/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/t/pg/In PDF document text
    • http://ns.adobe.com/xap/1.0/sType/Dimensions#In PDF document text
    • http://ns.adobe.com/xap/1.0/g/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/AcrobatAdhocWorkflow/1.0/In PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0079_000.js pdf-javascript-stream PDF /JS object 79 at offset 0x2F9AE 84 bytes
SHA-256: 65e9a29d746d5dddb837ecf61cddc8549317c2e34bc5889766d31ed5439d0d72
Preview script
First 1,000 lines of the extracted script
event.value = (identity.corporation || (event.source.source || this).Collab.user);
javascript_obj0092_001.js pdf-javascript-stream PDF /JS object 92 at offset 0x30A20 77 bytes
SHA-256: c2e67a2082df30a7ed12a10d10cbf39435b6a553f9df2092ceabdff9182523f8
Preview script
First 1,000 lines of the extracted script
event.value = (new Date()).toString();
AFDate_FormatEx("HH:MM, dd/mm/yy");
javascript_obj0084_002.js pdf-javascript-stream PDF /JS object 84 at offset 0x3007A 276 bytes
SHA-256: e476bd42cb1c72a43c281369607f4467e03230e3f26c32d563407e600c6aec99
Preview script
First 1,000 lines of the extracted script
event.value = (new Date()).toString();
AFDate_FormatEx("HH:MM, dd/mm/yyyy");
event.value = "Par " + ((!identity.name || identity.loginName != (event.source.source || this).Collab.user) ? (event.source.source || this).Collab.user : 

identity.name) + " , " + event.value;

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