Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf9a3224cb969d5c…

MALICIOUS

PDF

35.1 KB Created: 2020-05-30 17:22:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33b9af6c2f1768a176df0a85dabeafba SHA-1: 4d2eb0c366b5e32a1d1b735bccd81f25286c1f9f SHA-256: bf9a3224cb969d5cba97d47893e56d06224f8edd5877c6cdd1ffc89155d86750
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection strategy. The ML_NYX_PDF_MALICIOUS heuristic also strongly indicates malicious intent. The embedded URLs point to various domains, likely serving as landing pages or hosting further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://barzillaimusic.com/uploads/1/3/0/3/130324167/130324167.html#nuforce+dda-100+remote
    • http://theburp.org/uploads/1/3/1/3/131380453/2125504.pdf
    • http://covenantcreek.net/uploads/1/3/0/9/130969054/jevari-setud-gomuxi.pdf
    • http://students4america.org/uploads/1/3/1/3/131398195/rokanazaziseme.pdf
    • http://ww.roddenberrydrt-handbook.com/uploads/1/3/0/8/130815115/9381956.pdf
    • http://maryredden.com/uploads/1/3/0/5/130588951/6153177.pdf
    • http://ur4everhome.com/uploads/1/3/0/7/130776787/381751.pdf
    • http://toyiq.com/uploads/1/3/0/3/130313536/6833476.pdf
    • http://opjrecords.com/uploads/1/3/0/8/130814596/53aa91ef2c9f05.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_off00005e04.bin
09cf418d3f2409e9a17aa2b24a42186d737eb21ddb626d570ba0210e3b88b356		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E04 10472 bytes

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