Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3357bbaf2bc3c4c…

MALICIOUS

PDF

62.8 KB Created: 2021-01-30 03:27:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 41a5f488d1d11de6f6189ed4acb24f05 SHA-1: 9771bc279a113376b0a3ea6acf47be2b22cb3fb2 SHA-256: b3357bbaf2bc3c4cd893eb1f324eaabb983643b64b48eaddf9b8273a711eee88
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/wb?keyword=mountain%20bikes%20for%20sale%20online%20australia PDF link annotation
    • http://erkutungotu.com/affidavit_of_guardianship_for_dost_scholarshippjj2j.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405644/normal_5fcda0749042d.pdfIn PDF document text
    • https://logesili.weebly.com/uploads/1/3/5/3/135389335/88cc8b.pdfIn PDF document text
    • http://proba7.xyz/metugogzg9mi.pdfIn PDF document text
    • http://xobezised.iblogger.org/buzzfeed_gift_guide_for_him.pdfIn PDF document text
    • http://prostochillforum.fun/57485849270qwpi9.pdfIn PDF document text
    • http://dofukatejipoz.66ghz.com/mujik.pdfIn PDF document text
    • http://helpforteam.com/medical_physiology_by_gk_pal0h55p.pdfIn PDF document text
    • https://saxunada.weebly.com/uploads/1/3/4/8/134865385/rokufutibigemi_zofexa.pdfIn PDF document text
    • https://kexulisil.weebly.com/uploads/1/3/4/7/134762119/418e6a5.pdfIn PDF document text
    • https://tupalomixesitet.weebly.com/uploads/1/3/1/3/131379559/xufobesimefufu.pdfIn PDF document text
    • http://24goodstore.site/research_assistant_cvuoqs2.pdfIn PDF document text
    • https://julixejim.weebly.com/uploads/1/3/5/3/135393951/bedibutotup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fopalemominito.epizy.com/entry_of_the_gladiators_sheet_music_flute.pdfIn PDF document text
    • http://napubuxuwel.epizy.com/informe_de_austeridad_del_gasto_funcion_publica.pdfIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC8A 4968 bytes
SHA-256: 7a5987fa98be7fa2cad4a0bbb5f5bda66ee30c3427b625a8b39360479ba92627
font_01_sfnt_off0000cd93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD93 9548 bytes
SHA-256: e9ac432988ce7da5a48c458643a0d6595aec5e5f37cf79d3a31119da0afc03b1