Malicious PDF — malware analysis report

Static analysis result for SHA-256 b37182700d7b7560…

MALICIOUS

PDF

39.0 KB Created: 2020-05-20 02:54:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd63a76e623064a5231e17e2dc6678b0 SHA-1: b3502cfd87990aca36ca71539f9d94a2769eff02 SHA-256: b37182700d7b7560050e5c8d35ef76395b6a0de87449f1ae72f316776866c6a2
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted across various domains. This technique is often used for SEO poisoning to drive traffic to malicious sites or to distribute malware. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm. No scripts were extracted from this sample.

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://myytr.net/uploads/1/3/0/8/130813582/130813582.html#que+es+una+hipotesis+para+ni%25C3%25B1os
    • http://granitemerchantsolutions.com/uploads/1/3/0/3/130323145/dofemivezofi-xevuj-jefazavunemef.pdf
    • http://ganhaepoupa.com/uploads/1/3/0/5/130588681/valewaxevom_felosonaw.pdf
    • http://exquisitepoolsandlandscapes.com/uploads/1/3/1/6/131637306/gavivi.pdf
    • http://tipologiagourmet.com/uploads/1/3/0/5/130542909/kopesarusipides.pdf
    • http://laviebien.com/uploads/1/3/1/4/131482997/4792892164.pdf
    • http://fotostudiolw.com/uploads/1/3/1/4/131437173/telabaxigiwesa.pdf
    • http://diamondbuilds.com/uploads/1/3/0/7/130738991/meduzigal-dikitoj-rigatuvedinixos-bejixol.pdf
    • http://tealmagnoliajewelry.com/uploads/1/3/1/1/131163660/5245666.pdf
    • http://postnataltherapyservice.com/uploads/1/3/0/6/130620501/vowiwizitiki-damonibiroz-mumexalo.pdf
    • http://beprettycountry.com/uploads/1/3/0/6/130620389/285987.pdf
    • http://ampmjanitorial.net/uploads/1/3/0/8/130874570/9032487.pdf
    • http://ostross.com/uploads/1/3/1/0/131070806/39952.pdf
    • http://americanworktop.com/uploads/1/3/0/5/130551210/foporiripaz.pdf
    • http://freerangeme.net/uploads/1/3/0/5/130539554/3515108.pdf
    • http://thegeneticcode.online/uploads/1/3/1/4/131453897/kepureguvoxute.pdf
    • http://worldwideenglish.asia/uploads/1/3/0/5/130589126/situj_tolujezakowut.pdf
    • http://mnrentalhome.com/uploads/1/3/1/4/131483603/dojajek_konub.pdf
    • http://mycutiepatutie.com/uploads/1/3/1/6/131636872/20744ce07.pdf
    • http://condivir.com/uploads/1/3/0/2/130288394/nevife_jesapodel.pdf
    • http://yourcareercollaborator.com/uploads/1/3/0/3/130323403/tasetil.pdf
    • http://futsal415.net/uploads/1/3/1/8/131871449/xaxejabax-kawokanobe-xifarose.pdf
    • http://safetygradelicensure.org/uploads/1/3/1/4/131453276/lesewixapulodo.pdf
    • http://bakehouseco.com/uploads/1/3/1/4/131437967/2363669.pdf
    • http://morrisseauartist.com/uploads/1/3/0/7/130739048/5dd0795fc.pdf
    • http://tarabarkerfineart.com/uploads/1/3/0/7/130739238/vemuzizajedori.pdf
    • http://tarabarkerfineart.com/uploads/1/3/0/7/130739238/
    • 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_off00006ad3.bin
23a5b01ccf1e0a188e16b0135350469a502792974f51dc6ba54000b767821182		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD3 10856 bytes

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