Malicious PDF — malware analysis report

Static analysis result for SHA-256 4be7e3677442a0a3…

MALICIOUS

PDF

71.9 KB Created: 2021-03-03 23:33:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: bd3988bf860a12505d839bac1ed2add7 SHA-1: 20312d6143bafd3d96b0ebea322ae9290b80e7b8 SHA-256: 4be7e3677442a0a33720e68ed81fba0751d16c5e5896fe51ca280430798c7c62
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/wix?keyword=five+letter+words+starting+with+er PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448094/normal_5fe907ee4728b.pdfIn PDF document text
    • https://cdn.sqhk.co/xegunorasu/gfjdhsh/zexuxigojelugisogabixeli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374968/normal_6029741d75c0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504641/normal_602565d40c782.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449421/normal_601207dac7531.pdfIn PDF document text
    • http://bidetoluji.getenjoyment.net/pluralism_theory_of_state.pdfIn PDF document text
    • http://worelimupuvefam.mywebcommunity.org/42816048005.pdfIn PDF document text
    • http://vipimuxatomefi.medianewsonline.com/zidudobabuwagitoremijo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481999/normal_5fe4d74fce124.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vakizonozajaxe.onlinewebshop.net/zogafotemisitot.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/diabetes_treatment_guidelines_in_india.pdfIn PDF document text
    • http://fuguzametekobo.myartsonline.com/tc-helicon_voicelive_touch_2_manual_espaol.pdfIn PDF document text
    • http://zitasixan.atwebpages.com/fokoj.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_off0000dcec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEC 5192 bytes
SHA-256: c0b5ac94969c5bc94f311b03dd6f8cceed17f566a7475667ec6ba35e14c39400
font_01_sfnt_off0000eea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA7 10716 bytes
SHA-256: 0e496f02edddc7ad9242de06e1674bca73e0831ab8f9d87cb506f1f6ae0af90d