Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e1e2a05488ddcfa…

MALICIOUS

PDF

82.5 KB Created: 2021-03-19 15:44:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f786452bc3e4ce429c5effead76818df SHA-1: 1178bbd00827f0ac677de09f37d6737769c1dfb9 SHA-256: 8e1e2a05488ddcfa746fd4f5a9313d323289e6d81468ddeab763f9ecced697af
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://golowaki.ru/award?keyword=apes+book+pdf PDF link annotation
    • http://indir-kazan.com/dr_seuss_horton_hears_a_who_full_movie_download_in_hindivogbu.pdfIn PDF document text
    • http://komarovskii.xyz/459300343961oy0u.pdfIn PDF document text
    • http://organic100.fun/wemusawuniromogafajerete0i8bq.pdfIn PDF document text
    • http://xijafagupigor.22web.org/adjoint_of_a_2x2_matrix.pdfIn PDF document text
    • http://vedivux.mygamesonline.org/watercolor_techniques.pdfIn PDF document text
    • http://jolovomolosubi.getenjoyment.net/psychodynamic_psychotherapy_cabaniss.pdfIn PDF document text
    • http://rogosevit.22web.org/messenger_app_for_android_5._1.pdfIn PDF document text
    • http://sollabs.xyz/nasm_study_guide_2020_freeqxt5i.pdfIn PDF document text
    • http://nakozek.mypressonline.com/rewrite_conditionals_exercises.pdfIn PDF document text
    • http://zoxodur.sportsontheweb.net/how_to_calculate_the_unit_product_cost.pdfIn PDF document text
    • http://appless.space/garozudogivudajupuwx8ao.pdfIn PDF document text
    • http://bekopomulasebi.getenjoyment.net/18221998420.pdfIn PDF document text
    • http://hookup681.site/viriwepapiporesamiu3v60.pdfIn PDF document text
    • http://lomigakorak.getenjoyment.net/dicionario_alemao_portugues_download.pdfIn PDF document text
    • http://xakaderinetatu.mygamesonline.org/mandalas_colorear_nios.pdfIn PDF document text
    • http://carbackseat.site/oster_roaster_oven_cookbookd3ygt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jilovin.epizy.com/radadesufiwu.pdfIn PDF document text
    • http://vidobif.epizy.com/97204290179.pdfIn PDF document text
    • http://zepedijuva.epizy.com/29514237751.pdfIn PDF document text
    • http://fumibilulad.atwebpages.com/definition_of_arthritis.pdfIn PDF document text
    • http://nuluwajewugutik.onlinewebshop.net/87507444646.pdfIn PDF document text
    • http://pajiridi.rf.gd/graphic_design_free_download_mac.pdfIn PDF document text
    • http://fibubaxuvuvixik.epizy.com/how_to_become_a_better_reader.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_off0001064d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064D 4892 bytes
SHA-256: 11398aec90cb8eb7e916ad9e65a0bea115bab46bea4bb12f11ae2d10d346c483
font_01_sfnt_off00011704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11704 11524 bytes
SHA-256: 96126fe1d1dde5ce02444d21d910412bd8b782f905face466be900e8e09aae3f