Malicious PDF — malware analysis report

Static analysis result for SHA-256 e655495934739216…

MALICIOUS

PDF

90.8 KB Created: 2021-06-04 13:38:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 400dc27c89436a2c0f4288b2cdeebc20 SHA-1: 511384d7c1358d7e2327a41566f8ce1f2d7957b1 SHA-256: e6554959347392169751b0a9044bdaf72f0c744152da4be32b45c5d39a4df2d0
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many of which are disguised as movie download links, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads. No scripts were extracted, but the PDF structure itself is used to host and distribute these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://catamma.ru/pbw?utm_term=wrong+turn+3+movie+hindi+download+filmyzilla PDF link annotation
    • https://lafupoboj.weebly.com/uploads/1/3/1/8/131857117/ee70e6b2.pdfIn PDF document text
    • https://pipawini.weebly.com/uploads/1/3/4/8/134888109/5347343.pdfIn PDF document text
    • https://togawikanow.weebly.com/uploads/1/3/5/3/135320583/zasufuxafimeturok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/c8cbdc02-a9be-4bef-99f6-9f17c5e6f3d7/24068151391.pdfIn PDF document text
    • http://kepojijudiva.pbworks.com/f/cuanto_equivale_un_pie_en_metros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9efb143d-f0f2-465f-a701-43ac2f8d4dd6/intervencin_en_crisis_karl_slaikeu_descargar_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1d70f10-a806-44de-986b-1b610ce3b5a9/20250649879.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb800cc0-f9da-422d-b46e-c3270d89c37f/what_are_some_professional_growth_goals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3993c2af-1e97-44aa-8b0e-e83471a2bde7/inteligncia_emocional_augusto_cury.pdfIn PDF document text
    • http://supijexed.pbworks.com/f/chemical_reactor_analysis_and_design_froment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d125167-f13c-48ba-aa9f-b90f3614666a/panabiteje.pdfIn PDF document text
    • http://pezeliv.pbworks.com/f/how_to_use_a_prepaid_electricity_meter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9309c5c-b37d-43b4-ae87-9e451c9ab6b6/easy_way_to_learn_sanskrit_in_tamil.pdfIn PDF document text
    • http://lakebimutep.pbworks.com/w/file/fetch/144419808/manual_al_quran_tagging.pdfIn PDF document text
    • http://furalagaposu.pbworks.com/f/gender_race_and_class_in_media_5th_edition_free.pdfIn PDF document text
    • http://sisagexal.pbworks.com/w/file/fetch/144505140/xodikoluvawob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b3efa06-3a49-4961-99c7-b7ee8e4d4f70/81480744233.pdfIn PDF document text
    • http://xovakovawup.pbworks.com/f/kizizamonemesetejazijos.pdfIn PDF document text
    • http://risoxef.pbworks.com/f/what_is_un_sdg_goals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d3d57d0-f1e6-418c-b41b-a583ee0a999b/wazilinewativobufafasotas.pdfIn PDF document text
    • http://jetipufagi.pbworks.com/w/file/fetch/144442566/letter_recognition_worksheets_for_preschoolers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d90e05df-1c27-41bd-80f2-1b65341f91f7/pavapiso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e1dd67c-882e-4739-a46b-ef50c2cc7068/pdf_bromatologia_de_los_alimentos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eec0cf6-3ee3-435c-927b-0019f7d7df54/what_is_the_role_of_my_supervising_social_worker.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000114a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A5 5508 bytes
SHA-256: 3e7a3d8bbacfe107a81c15d1fb49c84e310163ec773b169426248a57f89cd1e7
font_01_sfnt_off0001275a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1275A 11964 bytes
SHA-256: b29784053aec54f17fc751bb6ffdbf017895ef2354a06c4086dc72377777cb02
font_02_sfnt_off00014f6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F6B 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34