Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba5bf2811dc21f0a…

MALICIOUS

PDF

79.6 KB Created: 2020-06-03 22:58:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aece2704c38bb6de242b485ecae3fad9 SHA-1: d18ab014ebb088563060b86ad2cec97e3707715e SHA-256: ba5bf2811dc21f0aa5ba8621044657cd2c686c2844816ae8df26e7d2e4768cc6
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, many of which point to domains that appear to be part of a link farm. The document body, though partially corrupted, contains text related to education and the authoring application, suggesting a lure. The primary external URI identified is http://tourismfieldlearning.com/uploads/1/3/0/7/130775404/130775404.html#autores+que+hablen+de+la+educacion+f, which is likely used to redirect the user to a malicious site. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://tourismfieldlearning.com/uploads/1/3/0/7/130775404/130775404.html#autores+que+hablen+de+la+educacion+f
    • http://boscopix.cz/uploads/1/3/0/4/130476574/jiduwikorikitaj_sekivaso_kelugotik.pdf
    • http://naylorbythewater.net/uploads/1/3/0/5/130589010/27b3102dd3cd5.pdf
    • http://pkoutfits.net/uploads/1/3/0/8/130814681/502ca48a87.pdf
    • http://hanatlaw.com/uploads/1/3/0/5/130588757/faguxazimo-dinidinoloruga-kifixaj.pdf
    • http://tourismfieldlearning.com/uploads/1/3/0/7/130775404/terms.html
    • http://tourismfieldlearning.com/uploads/1/3/0/7/130775404/dmca.html
    • http://tourismfieldlearning.com/uploads/1/3/0/7/130775404/policy.html
    • https://pulonajigulo.files.wordpress.com/2020/06/8494949722.pdf
    • https://juwafozin.files.wordpress.com/2020/06/rosipusiwowujitizes.pdf
    • https://zofutemuzup.files.wordpress.com/2020/06/dizimezitadonopabokuxexa.pdf
    • https://fufumifuka725055015.files.wordpress.com/2020/06/sisotiretujodexesu.pdf
    • https://xodugunoku.files.wordpress.com/2020/06/nizirugagodigezewuk.pdf
    • https://vebetume.files.wordpress.com/2020/06/94445127861.pdf
    • https://rurilaxun.files.wordpress.com/2020/06/44385160516.pdf
    • https://jetufaru.files.wordpress.com/2020/06/bobefevaru.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_off0001075f.bin
5a12cf49a74e9a849dbf26064c375f86b37332790323c687022d0fd718dd983c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1075F 13328 bytes

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