Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bde778ed4fbaf87…

MALICIOUS

PDF

72.6 KB Created: 2021-02-23 16:07:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: fd4baefa4f5d1481b7b337662b22e615 SHA-1: e18937214b0b93a88c122ce5f98afe0537a9fd1a SHA-256: 5bde778ed4fbaf8789154285e06e2272d047ff1b8a057ecafe1ec6c00f49ac2e
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/wix?keyword=paper.io+2+unblocked+games+at+school PDF link annotation
    • https://xajowaluvuro.weebly.com/uploads/1/3/5/3/135303047/3b3a551a5.pdfIn PDF document text
    • https://ponorevex.weebly.com/uploads/1/3/1/3/131398269/toviremajak-detifanisudak.pdfIn PDF document text
    • https://towuzisutodugo.weebly.com/uploads/1/3/0/9/130969847/xumufa_tezaxup_potozed.pdfIn PDF document text
    • http://smeshnoykir.space/united_states_army_reserve_center_locationinn4h.pdfIn PDF document text
    • http://jurelireroxux.22web.org/balunebabopep.pdfIn PDF document text
    • https://garegijewavib.weebly.com/uploads/1/3/4/3/134389285/bizibegin-nosusu-vewadav.pdfIn PDF document text
    • http://musc-media.xyz/barcode_app_for_android_phonejo935.pdfIn PDF document text
    • https://vemosesagegedow.weebly.com/uploads/1/3/4/3/134312783/27e6a900b8.pdfIn PDF document text
    • https://dalideno.weebly.com/uploads/1/3/5/3/135384103/8199329.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/mogipegi/electrical_safety_certificate_template.pdfIn PDF document text
    • http://pibekolovaxizon.epizy.com/bambukat_full_movie_480p.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/12548286746.pdfIn PDF document text
    • http://vonanovab.epizy.com/todes.pdfIn PDF document text
    • http://novumejam.epizy.com/mapping_method_template.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_off0000dde0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE0 5856 bytes
SHA-256: 9acd460114213a67c260e34cfaed0b5cc0ce713ce1797a1087b613ea9f397f4c
font_01_sfnt_off0000f1a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A4 10608 bytes
SHA-256: 165b706a24498ac736097226bf1baa51ff1019fa40921e0a3e419bf95e0beac0