Malicious PDF — malware analysis report

Static analysis result for SHA-256 d86704d01373e012…

MALICIOUS

PDF

92.5 KB Created: 2021-03-18 21:40:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 83bfce6501a6864a7d68fe18d35afbd3 SHA-1: 505fd54d029870617695487433e069974c8fa75c SHA-256: d86704d01373e012ebb904fcc0f5b3e0629bf1e4ebe353df8c72d817929da1b1
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are flagged as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://vilenefex.ru/award?keyword=contoh+soal+aritmatika+dan+geometri+pdf PDF link annotation
    • http://j3vnci4.xyz/how_to_clock_in_kronos6s4fu.pdfIn PDF document text
    • http://buzevuzelape.mywebcommunity.org/best_interview_questions_and_answers_for_freshers.pdfIn PDF document text
    • http://phulop.store/what_are_the_restrictions_on_a_drivers_permit7q67u.pdfIn PDF document text
    • http://ralugugifoxatir.scienceontheweb.net/application_of_remote_sensing_and_gis_in_disaster_management.pdfIn PDF document text
    • http://bivaxosufuxibo.mygamesonline.org/spirited_away_one_summers_day_guitar_chords.pdfIn PDF document text
    • http://lulilafemavivog.mygamesonline.org/clinical_pharmacology_made_ridiculously_simple_5th_edition.pdfIn PDF document text
    • http://support-copyrighthelpservice-about.com/gidenab7tbr3.pdfIn PDF document text
    • http://asta-stroy.ru/ranofisefomizototatori0w0.pdfIn PDF document text
    • http://ramifapufebi.scienceontheweb.net/disgenesia_gonadal_pura_y_mixta.pdfIn PDF document text
    • http://gepavozo.mygamesonline.org/when_terms_are_fob_shipping_point.pdfIn PDF document text
    • http://cucoupon.info/sosomoradekuxokifazetic8s0m.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://c1cb471f-fc5c-4ef2-b3e1-4d0d0d09d135.filesusr.com/ugd/cc5b41_1bb28c8a019c46ac80f0081fc257eb5d.pdf?index=trueIn PDF document text
    • https://69cf8a46-0d3d-4b71-8fd1-93df925da18e.filesusr.com/ugd/e4064d_c860fcc967ac4027b0ac6c45ea3f61f0.pdf?index=trueIn PDF document text
    • http://wegugoleta.onlinewebshop.net/what_is_the_meaning_of_modern_political_theory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddeb8f04-1cf6-43b0-a59e-2439364a4314/thermador_range_griddle_cleaning.pdfIn PDF document text
    • http://dafuwinev.myartsonline.com/2020_national_bravery_award_winners.pdfIn PDF document text
    • https://203aa715-7352-46b1-b16b-5d0aeeaa27a2.filesusr.com/ugd/0582e0_781f259e48be40c385103762190a72cc.pdf?index=trueIn PDF document text
    • https://69868269-04aa-4a0d-8379-1371762fd556.filesusr.com/ugd/d8beff_1fc49fb73c504328b59bd2441d712e29.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/70681b10-ba3d-4f97-9e22-e866299fbb02/57557610029.pdfIn PDF document text
    • http://zitulogakapede.myartsonline.com/73018653918.pdfIn PDF document text
    • http://tudixuzaw.onlinewebshop.net/what_a_word_for_listening_devices_in_movie_theaters.pdfIn PDF document text
    • https://35e1cc1d-5f6c-4a41-9b1b-b9ae8dddc97a.filesusr.com/ugd/351eee_2883aec9c7624015a2d9b852f23ad371.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bc8d332-73b7-47f5-81cc-f604c0b44a11/wikujutevexukusirevokomo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76637d3a-a223-44ee-9f8c-cb3b95e80db9/fomupuzu.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_off00011d92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D92 5328 bytes
SHA-256: 4039fe09b2647198dbeb3322d1027aaa17871150ddcd92192322892290b7cf0f
font_01_sfnt_off00012f7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F7F 11276 bytes
SHA-256: 84b5cc30471e938d425434be2f10bffabda34aea77c0b8349feead11b8195d21
font_02_sfnt_off00015619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15619 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378