Malicious PDF — malware analysis report

Static analysis result for SHA-256 b50b61a4d6efd5ac…

MALICIOUS

PDF

73.8 KB Created: 2021-02-13 00:05:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7ac1cd773f1685ab48d158b0321fd4da SHA-1: fbf9ae8817a2447f0b959ac9fed09698fad876c1 SHA-256: b50b61a4d6efd5acbeed5a60dd795b9d38ef9683975b1fa7587bfe9812569cc6
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wb?keyword=anime%20moba%20games%20for%20android In PDF document text
    • http://copyright-security-ig.com/50939150244a6thz.pdfIn PDF document text
    • http://kinoogf.space/consumer_reports_shark_apex_vacuumsxz3r.pdfIn PDF document text
    • https://kewakovek.weebly.com/uploads/1/3/4/4/134467638/nomefigufogeviw.pdfIn PDF document text
    • http://xusonawifofi.iblogger.org/nizimozutekomiri.pdfIn PDF document text
    • http://reestr.site/keroso7960w.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450043/normal_5ffb2bc3783c3.pdfIn PDF document text
    • http://neojust.ru/anyview_cast_app_hisenseepk9o.pdfIn PDF document text
    • http://tohld.in/rupukemuvo46fl0.pdfIn PDF document text
    • http://razvivatel.blog/university_physics_with_modern_physics_14th_edition_solutionsaiet7.pdfIn PDF document text
    • https://nutomejeti.weebly.com/uploads/1/3/4/7/134702699/radiwirowi_poronakolilatum_tenerobi_jajiviv.pdfIn PDF document text
    • https://jibunomo.weebly.com/uploads/1/3/5/3/135348462/2651363.pdfIn PDF document text
    • https://pawonojureva.weebly.com/uploads/1/3/4/5/134522231/9b68c6e856eee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xoxozuzupa.rf.gd/zasatilorilipefomapel.pdfIn PDF document text
    • http://bevamixebigal.epizy.com/dsssb_answer_key_89_17.pdfIn PDF document text
    • http://jatuxijor.epizy.com/11336560358.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_off0000e464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE464 5324 bytes
SHA-256: cc58cdb3d3fec0526debe176d3d1b97bdc54723853a201b95d950c5d50b2d4a8
font_01_sfnt_off0000f66b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66B 10600 bytes
SHA-256: 5652602ba15cfa683c00ef8e43452909815d719881fb5612edc5ed0d512c22b3