Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8fea690d7d58e82…

MALICIOUS

PDF

71.5 KB Created: 2021-03-03 18:07:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: fb932ab7096c3dc27e63482c69ccbeb8 SHA-1: 9939242e0d21ae854fcfa2580b87be3e003d84f8 SHA-256: a8fea690d7d58e829b12052da8b858d2bb3cc6a9cdb072e8d6bb422c40bc085c
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://nipisod.ru/award?keyword=is+our+lady+of+the+lake+university+a+private+school PDF link annotation
    • https://cdn.sqhk.co/dodamewope/jjgiPjf/xiten.pdfIn PDF document text
    • https://cdn.sqhk.co/fexejikexew/gdidjaY/detectives_united_timeless_voyage.pdfIn PDF document text
    • https://warajepujevofi.weebly.com/uploads/1/3/1/8/131857140/bagix_zejekupulet.pdfIn PDF document text
    • https://cdn.sqhk.co/mugodetutag/jORjjgc/fofevama.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/fKgehhb/13023532600.pdfIn PDF document text
    • https://cdn.sqhk.co/xonarewu/hnKibsB/sara_cooking_ice_cream_games.pdfIn PDF document text
    • https://lakenugud.weebly.com/uploads/1/3/4/9/134901786/nezotozagexeza-wazimalowes.pdfIn PDF document text
    • http://iuts.space/commercial_cool_deep_freezerzs01z.pdfIn PDF document text
    • http://mscgis.net/26003304193m9tq9.pdfIn PDF document text
    • https://cdn.sqhk.co/latusetime/6OWbieP/37800310027.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415745/normal_602ca3a2e1b35.pdfIn PDF document text
    • http://rabejagoruwobol.66ghz.com/guwadejadavupaxil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dalegesezo.rf.gd/new_city_catechism_curriculum_review.pdfIn PDF document text
    • http://tuxesoguzegisox.epizy.com/formal_dresses_winter_2019.pdfIn PDF document text
    • http://puwomuf.rf.gd/pubeze.pdfIn PDF document text
    • http://sujidise.epizy.com/glasses_usa_insurance_form.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_off0000d966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD966 5408 bytes
SHA-256: 27d96369776f0a0a1cf633db9630b326597daf5c103d54a5231d63dee14512d9
font_01_sfnt_off0000ebcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCF 10888 bytes
SHA-256: af872745167db24b6fa18f531d38eea8a11f4648f226c4905fd2c03a96013698