Malicious PDF — malware analysis report

Static analysis result for SHA-256 036e2ab19b50204a…

MALICIOUS

PDF

77.7 KB Created: 2021-06-13 05:51:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: dff2fda10d71e751c9374245741194e3 SHA-1: 1891b693f246adb0e3f562ab29d0e47471202cd4 SHA-256: 036e2ab19b50204aefb0328ab512b8bbe87c2f0d634ed0a6c87e914a29341eee
186 Risk Score

Malware Insights

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

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 0.9992

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://golowaki.ru/123?utm_term=cast+screen+apk+for+tv PDF link annotation
    • https://vatalinonabalix.weebly.com/uploads/1/3/4/2/134234662/695f7dbc8cc54.pdfIn PDF document text
    • https://bazubipevudupu.weebly.com/uploads/1/3/4/8/134876407/9489092.pdfIn PDF document text
    • https://fogodaxo.weebly.com/uploads/1/3/4/6/134606017/tenixovuku_daludezawugak_xades.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b75a0e5-9a82-4ab1-b6a2-477265503ceb/xopukeburim.pdfIn PDF document text
    • http://kedetuwi.pbworks.com/f/python_machine_learning_sebastian_raschka_review.pdfIn PDF document text
    • http://zosajivapesi.pbworks.com/w/file/fetch/144643722/bosquejos_cristianos_para_predicar_en_cumpleaos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae8e5c6e-a823-42fc-96ef-c77f69e256b4/how_to_connect_hp_officejet_6500a_plus_to_wifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bfb17d5-9bea-40df-abdd-38903fb46b86/bovigikorujutu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/554686ee-55d2-461d-a183-e8daafc4dcf7/pagika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2b43c65-1683-4ac8-bef1-b440e3e0ee6d/how_to_measure_charles_tyrwhitt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6eea66e4-6bce-44d2-b33a-d639702d64c6/zasiwurobisudinodelo.pdfIn PDF document text
    • http://sodopateduke.pbworks.com/w/file/fetch/144735282/windows_8.1_os_fully_activated_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f49b2397-6afb-4c79-95ff-492ccee77284/toro_6.5_hp_recycler_lawn_mower_blade_change.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ec635b2-7cbb-4f93-a81d-e5aae9a337bc/kitchenaid_superba_fridge_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f83dd9a-3c5f-4fc9-ab6d-64e56c0d437a/medical_certificate_form.pdfIn PDF document text
    • http://kirozatijawu.pbworks.com/w/file/fetch/144508467/dajazugojulibiruja.pdfIn PDF document text
    • http://rubuxesi.pbworks.com/w/file/fetch/144839106/vutepakirivu.pdfIn PDF document text
    • http://supatibu.pbworks.com/f/nadebuzuletiloweroreno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/491c5bc2-ea93-4217-9dd2-8303c7a773b5/la_fitness_goldenrod_class_schedule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/289ba1f2-8fd6-4ffe-86e7-b33dab66f3b4/98160351167.pdfIn PDF document text
    • http://komopix.pbworks.com/w/file/fetch/145226502/85928618911.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4a1800b-533b-495b-8998-80becd39b645/how_to_attach_swiffer_sweeper_wet_pads.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13243397-3271-4451-8a20-e8ad20c8f65c/all_the_greek_gods_and_goddesses_names_and_what_they_do.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_off0000f16e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16E 5004 bytes
SHA-256: cfea302b3cc690ec4a65c245f6aefa41621f7945d7d12d9d3c0d22dd01b16f5b
font_01_sfnt_off0001028d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028D 11404 bytes
SHA-256: b3f4aa21ceec4c35f485f9eed433ebf59fa5fb247c4fad261660571dcb937330