Malicious PDF — malware analysis report

Static analysis result for SHA-256 d82c69b817dad43e…

MALICIOUS

PDF

70.2 KB Created: 2021-02-17 20:44:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8ab0eb05314748585bc4758a75fdd4b8 SHA-1: 34456b4c2add3214bb421c55bdb66a007ea1e07e SHA-256: d82c69b817dad43e36264ccc0965788c5f2b1221665f5518b398d547dd568473
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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/wix?keyword=castles+and+crusades In PDF document text
    • http://sbrf.link/tajopidowokugp8zf.pdfIn PDF document text
    • http://padakogako.iblogger.org/40672546467.pdfIn PDF document text
    • http://keep-travel.com/stochastic_differential_equations_on_manifolds3rp06.pdfIn PDF document text
    • http://renavakurexiroz.22web.org/45783292652.pdfIn PDF document text
    • http://mepotir.iblogger.org/nukotemowonudirogafogi.pdfIn PDF document text
    • http://health2health.online/77345927559w9bl5.pdfIn PDF document text
    • http://ketorebagibof.22web.org/project_management_risk_breakdown_structure_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409098/normal_6026322c8f667.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/vuraradaso/brightworks_sharepoint_project_management_template.pdfIn PDF document text
    • http://bavidoripo.epizy.com/epsxe_zlib1._dll.pdfIn PDF document text
    • http://mojofukiw.epizy.com/99852090887.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/android_sdk_install_package_command_line.pdfIn PDF document text
    • http://bitugoxopezuwu.rf.gd/kovopewujipijij.pdfIn PDF document text
    • http://wedutatitupaze.epizy.com/aprilaire_thermostat_manual_8363.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000f032.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF032 17996 bytes
SHA-256: a042c36f4d97d532d1d17d817403b5fe15d945173e98f8318142483e9cee36be
font_00_sfnt_off0000bc8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC8D 4836 bytes
SHA-256: f178385c52d3c6515fe516300ac721be83397cf921a091f907e5bb109372a6b7
font_01_sfnt_off0000cd04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD04 10212 bytes
SHA-256: a697ead92db4626261afb05e939f885c7604b19ad7044074ce61061e497c2c19