Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0ad210fd0942eee…

MALICIOUS

PDF

88.6 KB Created: 2021-03-31 03:03:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c394caa766ccb4fa8b8a8d04bafd53c4 SHA-1: ddcaacf3e084c5bbb20e9961ce9bcfa20c96ef0f SHA-256: f0ad210fd0942eeeccccb77fbe5104328092b5cbdc58e04c6c5add94e8c981c0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded URLs and heuristics indicate it's part of a link farm, suggesting a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://mezovuduw.ru/wix?keyword=daffynition+decoder+ozone+and+mistletoe+answers
    • https://static.s123-cdn-static.com/uploads/4467306/normal_6006caef23f7b.pdf
    • https://kubinivoboduwu.weebly.com/uploads/1/3/4/6/134601548/ca5c3ad6.pdf
    • https://levarimabogi.weebly.com/uploads/1/3/5/3/135328943/dizisol.pdf
    • https://tubuzitobez.weebly.com/uploads/1/3/4/1/134108618/bizaso_kadimisagerume_mifiwobapakinez.pdf
    • https://static.s123-cdn-static.com/uploads/4367687/normal_6001f752a8e0e.pdf
    • https://rafutukeri.weebly.com/uploads/1/3/1/4/131453201/devug_titofukixemupe.pdf
    • http://moratelusubuzol.22web.org/the_primal_blueprint_cookbook.pdf
    • https://cdn-cms.f-static.net/uploads/4501374/normal_6052b5cc7a899.pdf
    • https://tokegomobox.weebly.com/uploads/1/3/4/3/134314144/8758284.pdf
    • https://wiloropijevor.weebly.com/uploads/1/3/5/2/135299547/8919957.pdf
    • https://static.s123-cdn-static.com/uploads/4379486/normal_5ffa264da2e77.pdf
    • https://kadonomu.weebly.com/uploads/1/3/1/4/131454950/ribuzesi-nivusa-gejubitilu-jerotinatuw.pdf
    • https://static.s123-cdn-static.com/uploads/4367631/normal_6001b84eba2e9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://moxawaten.epizy.com/gisoposojunokitosavitume.pdf
    • https://6f81cef9-66a2-447d-9e1d-4c0427ef15c5.filesusr.com/ugd/4d935e_ca130348096e44ff9b040b2786fa8e85.pdf?index=true
    • http://zefukasuwowejev.epizy.com/bujiropogujirumubutovazat.pdf
    • https://d872ce2a-2baf-4032-ab86-ab75b2f66d52.filesusr.com/ugd/338562_4c9f43f5855d4f579a660e86fde17e6a.pdf?index=true
    • http://luwulifinuneti.epizy.com/59877464541.pdf
    • https://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_6b4d38f0a2ac4878808fcd9dcaf59d40.pdf?index=true
    • https://ad9f1622-e3b7-49db-bfef-326c48fb2104.filesusr.com/ugd/a467d2_6e92dd4ecf874cbbac1b89ed6944a793.pdf?index=true
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001181c.bin
1478e484464fd6c9f5613b65d64e84feef3cda460c9e92a3494068703574e84f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1181C 5408 bytes
font_01_sfnt_off00012a9c.bin
bc53e1ee0d0e24fab1cef5e03b0a49f169021ec6190a06355844b20a3e122802		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A9C 13052 bytes

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