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) First seen: 2020-09-24
MD5: bd63a76e623064a5231e17e2dc6678b0 SHA-1: b3502cfd87990aca36ca71539f9d94a2769eff02 SHA-256: b37182700d7b7560050e5c8d35ef76395b6a0de87449f1ae72f316776866c6a2
96 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 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://myytr.net/uploads/1/3/0/8/130813582/130813582.html#que+es+una+hipotesis+para+ni%25C3%25B1os PDF link annotation
    • http://granitemerchantsolutions.com/uploads/1/3/0/3/130323145/dofemivezofi-xevuj-jefazavunemef.pdfIn PDF document text
    • http://ganhaepoupa.com/uploads/1/3/0/5/130588681/valewaxevom_felosonaw.pdfIn PDF document text
    • http://exquisitepoolsandlandscapes.com/uploads/1/3/1/6/131637306/gavivi.pdfIn PDF document text
    • http://tipologiagourmet.com/uploads/1/3/0/5/130542909/kopesarusipides.pdfIn PDF document text
    • http://laviebien.com/uploads/1/3/1/4/131482997/4792892164.pdfIn PDF document text
    • http://fotostudiolw.com/uploads/1/3/1/4/131437173/telabaxigiwesa.pdfIn PDF document text
    • http://diamondbuilds.com/uploads/1/3/0/7/130738991/meduzigal-dikitoj-rigatuvedinixos-bejixol.pdfIn PDF document text
    • http://tealmagnoliajewelry.com/uploads/1/3/1/1/131163660/5245666.pdfIn PDF document text
    • http://postnataltherapyservice.com/uploads/1/3/0/6/130620501/vowiwizitiki-damonibiroz-mumexalo.pdfIn PDF document text
    • http://beprettycountry.com/uploads/1/3/0/6/130620389/285987.pdfIn PDF document text
    • http://ampmjanitorial.net/uploads/1/3/0/8/130874570/9032487.pdfIn PDF document text
    • http://ostross.com/uploads/1/3/1/0/131070806/39952.pdfIn PDF document text
    • http://americanworktop.com/uploads/1/3/0/5/130551210/foporiripaz.pdfIn PDF document text
    • http://freerangeme.net/uploads/1/3/0/5/130539554/3515108.pdfIn PDF document text
    • http://thegeneticcode.online/uploads/1/3/1/4/131453897/kepureguvoxute.pdfIn PDF document text
    • http://worldwideenglish.asia/uploads/1/3/0/5/130589126/situj_tolujezakowut.pdfIn PDF document text
    • http://mnrentalhome.com/uploads/1/3/1/4/131483603/dojajek_konub.pdfIn PDF document text
    • http://mycutiepatutie.com/uploads/1/3/1/6/131636872/20744ce07.pdfIn PDF document text
    • http://condivir.com/uploads/1/3/0/2/130288394/nevife_jesapodel.pdfIn PDF document text
    • http://yourcareercollaborator.com/uploads/1/3/0/3/130323403/tasetil.pdfIn PDF document text
    • http://futsal415.net/uploads/1/3/1/8/131871449/xaxejabax-kawokanobe-xifarose.pdfIn PDF document text
    • http://safetygradelicensure.org/uploads/1/3/1/4/131453276/lesewixapulodo.pdfIn PDF document text
    • http://bakehouseco.com/uploads/1/3/1/4/131437967/2363669.pdfIn PDF document text
    • http://morrisseauartist.com/uploads/1/3/0/7/130739048/5dd0795fc.pdfIn PDF document text
    • http://tarabarkerfineart.com/uploads/1/3/0/7/130739238/vemuzizajedori.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD3 10856 bytes
SHA-256: 23a5b01ccf1e0a188e16b0135350469a502792974f51dc6ba54000b767821182

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