Malicious PDF — malware analysis report

Static analysis result for SHA-256 866ebb86ef09d749…

MALICIOUS

PDF

70.8 KB Created: 2021-03-01 20:26:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 472a64852b82036b78c5bda1352e1530 SHA-1: 076108e18043ddf7bd364c2fccca740d545eaf28 SHA-256: 866ebb86ef09d749ea6053f2a507f6158f06453510d270e409ed55344d991abd
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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 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://botokaw.ru/award?keyword=density+worksheet+2+answer+key PDF link annotation
    • http://ru-en.xyz/aetna_claim_form_internationalxcb2t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472753/normal_600a73285e402.pdfIn PDF document text
    • https://cdn.sqhk.co/roretuduva/jaPjKha/lebara_sim_card_activation_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/bexamajuw/wCgfhja/45853830600.pdfIn PDF document text
    • http://arfeshome.com/international_business_the_challenges_of_globalization_8th_edition_by_wild__wild_pearson_publishingh0gvw.pdfIn PDF document text
    • https://jenejipita.weebly.com/uploads/1/3/4/4/134473981/3800511.pdfIn PDF document text
    • http://55571.ru/coyuchi_organic_sheetsbly2x.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gomakobez/5484358953.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/whatsapp_business_account_apk.pdfIn PDF document text
    • http://jimugen.epizy.com/what_is_r_in_korean_alphabet.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_off0000db1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1D 5132 bytes
SHA-256: 6bdde1770b0a2f9c22995ca1cac6ba8948f530dd5545f608324edb799395b5d6
font_01_sfnt_off0000eca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA7 10036 bytes
SHA-256: 1d357538f5a003acdc525759f23cfbf0b9b889baf902d76e0f2ce5ba3f7d2764