Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebdc15e628f0276e…

MALICIOUS

PDF

38.0 KB Created: 2020-03-12 04:41:19 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: bf061aec8db833a36942354813c67cf2 SHA-1: 97851c7e98ade91bcf70d0c1bb1ca867d4d9d5f8 SHA-256: ebdc15e628f0276e37dd28e270df3d41d94830899c47be5b30f683fb7d5c02a7
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, a technique often used for SEO manipulation or to distribute malicious content. The document body presents a lure related to scholarship interviews, but the primary malicious activity appears to be the extensive link farm. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the suspicious linking behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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
  • 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.elegantcreations.net/uploads/1/3/0/4/130476214/130476214.html#questions+to+ask+the+interviewer+in+a+scholarship+interview
    • http://bjarkalundur.is/uploads/1/3/0/7/130739028/rejiz.pdf
    • http://prelude-to-action.com/uploads/1/3/0/4/130488786/c09c0ffa8.pdf
    • http://organiccrafttea.com/uploads/1/3/0/4/130489162/5151620.pdf
    • http://1corin1531.com/uploads/1/3/0/6/130604402/27c17d85.pdf
    • http://makingmobilefriendlywebsites.com/uploads/1/3/0/7/130739987/2454321.pdf
    • http://southernmilsim.com/uploads/1/3/0/7/130738548/kurogofumusi.pdf
    • http://mta-sts.mx.experimentalphotography.com/uploads/1/3/0/7/130739618/6860209.pdf
    • http://loveworks.nu/uploads/1/3/0/8/130873855/8109449.pdf
    • http://mta-sts.wendellresearchgroup.com/uploads/1/3/0/7/130739625/8dc9de19a6e50.pdf
    • http://shakti-circus.com/uploads/1/3/0/2/130287988/20134.pdf
    • http://paybyname.io/uploads/1/3/0/7/130740205/tefil.pdf
    • http://nymanenterprises.net/uploads/1/3/0/7/130739875/xotisupesosiloj.pdf
    • http://mapist.net/uploads/1/3/0/4/130476318/xowizagupu-batekix-roputalipow.pdf
    • http://triggie.com/uploads/1/3/0/2/130287394/korixe_nijarit_tibef_mimuwojenida.pdf
    • http://laurenandersonrealty.com/uploads/1/3/0/7/130775778/9b559c.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_off00006b9f.bin
14a592b4495e70dc2e3b1c619c79dd524de0af44942687c20b815f579e79dac1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B9F 8028 bytes

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