Malicious PDF — malware analysis report

Static analysis result for SHA-256 e39372837273ff42…

MALICIOUS

PDF

34.9 KB Created: 2020-03-29 07:04:22 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: dfce6b2f20486cc1eb84e5fee428c35e SHA-1: 1ae919c6e1b38539ea30fc9f0d28d47297d0a4f0 SHA-256: e39372837273ff423a09fe96ba66c9c390f670348ec34687ae4898cbcdb7e3dd
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of external links, many of which point to similarly structured URLs on different domains. This pattern is indicative of a link farm or redirection scheme designed to obscure the ultimate destination. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external URIs supports the conclusion that this document is part of a malicious distribution campaign. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://74-123-78-145.mgwnet.com/uploads/1/3/0/7/130775624/130775624.html#elements+of+design+definitions+and+examples
    • http://spmventures.com/uploads/1/3/0/5/130539660/wiwifunuvebekedufexa.pdf
    • http://addtechservices.net/uploads/1/3/0/5/130542909/8073638.pdf
    • http://elegantsilkhair.com/uploads/1/3/0/5/130544754/384a15.pdf
    • http://koonyagarlicfestival.com/uploads/1/3/0/6/130639835/fowalijixez-zozafuxalu-nujiwinadodore.pdf
    • http://www.mbkenyatrip17.com/uploads/1/3/0/6/130639757/e838c1bb120c9e1.pdf
    • http://creativityrevival.com/uploads/1/3/0/6/130620693/dafuwedisiw.pdf
    • http://brownfencing.com/uploads/1/3/0/6/130622024/6548850.pdf
    • http://desatascosmataro.org/uploads/1/3/0/5/130543019/9510498.pdf
    • http://start-base.se/uploads/1/3/0/6/130620407/9657770.pdf
    • http://bayareaboatandhomeloans.com/uploads/1/3/0/2/130291531/4859506.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006234.bin
04a6f333ce57856043d450d2d7ca2c03833546d54b25444a5012cc36357a0d9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6234 7296 bytes

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