Malicious PDF — malware analysis report

Static analysis result for SHA-256 515eaa6edafb0a53…

MALICIOUS

PDF

34.7 KB Created: 2020-06-02 05:17:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7757812501ac69ae7d8728e6ec8eabce SHA-1: e38dc671bbb0377308e8204a9a25bc55de3cf34b SHA-256: 515eaa6edafb0a53ee248d37818648418845a2efae7da00eda31f550bd16e947
62 Risk Score

Malware Insights

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

The PDF document contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains text related to 'Ejercicios de presente simple vs continuo' and mentions wkhtmltopdf, suggesting it might be a generated document. The primary attack pattern involves directing users to a large farm of external URLs, likely for SEO manipulation or to host further malicious content. No scripts were extracted from this sample.

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://riccijustisart.com/uploads/1/3/0/7/130775818/130775818.html#ejercicios+de+presente+simple+vs+continuo
    • http://twoguysandabroom.com/uploads/1/3/1/0/131070894/duketunefimot-kitam-badukibovoxiz.pdf
    • http://feature.yuuzuu.co.uk/uploads/1/3/0/8/130874350/9513565.pdf
    • http://olympiasts.com/uploads/1/3/0/5/130588924/xabuba_gavipokolonaw_zeralal_felizimov.pdf
    • http://jgmow.com/uploads/1/3/1/4/131437472/vusuzibok.pdf
    • http://elkhartcottagecarecrystalcottagecare.com/uploads/1/3/0/9/130968921/515401.pdf
    • http://1a2.undesirable.us/uploads/1/3/0/6/130620909/kozajenut.pdf
    • http://riccijustisart.com/uploads/1/3/0/7/130775818/terms.html
    • http://riccijustisart.com/uploads/1/3/0/7/130775818/dmca.html
    • http://riccijustisart.com/uploads/1/3/0/7/130775818/policy.html
    • https://lavasotesug.files.wordpress.com/2020/05/xifos.pdf
    • https://sujefeg.files.wordpress.com/2020/05/69713869919.pdf
    • https://dutubigibud.files.wordpress.com/2020/05/soramasisijesi.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_off0000588c.bin
2bfb9aae8fe46223899b65eb2b92549880c03b5b6f3334dd4fa9905228d9cc9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x588C 11436 bytes

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