Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a9074ca0dc33bbf…

MALICIOUS

PDF

76.8 KB Created: 2021-04-04 17:57:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 034fbd29c7a7f90e9c44e8f09e67de85 SHA-1: fdf8c51c9a41cd20e1fcbce5adc8373a52f8abf4 SHA-256: 5a9074ca0dc33bbf063d3a49c34176858abcc0592a8ff3c91d313550b7e5b6e0
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. The document body, though heavily obfuscated, suggests a lure related to 'killing floor incursion psvr aim controller'. The presence of embedded URLs and the link farm heuristic strongly suggest this PDF is designed to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 http://xipodijajul.sportsontheweb.net/cerfa_2020_rici.pdf In PDF document text
    • http://jafofuk.iblogger.org/biology_book_class_9_10.pdfIn PDF document text
    • http://volalagokiva.sportsontheweb.net/bernarr_macfadden_books.pdfIn PDF document text
    • http://zanovekolasin.mywebcommunity.org/chapter_7_cellular_structure_and_function_test.pdfIn PDF document text
    • http://rimonevo.iblogger.org/robevutigodaxix.pdfIn PDF document text
    • http://zutatowatipo.mywebcommunity.org/20932181720.pdfIn PDF document text
    • http://mozovurezet.iblogger.org/gafopusezuj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/mO-5lVq97NI/wb?keyword=killing%20floor%20incursion%20psvr%20aim%20controllerPDF link annotation
    • http://javixisapuv.epizy.com/napra_guidelines_for_non_sterile_compounding.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1a47449-9887-46ef-9a58-35dbf9283469/gnostic_infancy_gospel_of_thomas.pdfIn PDF document text
    • http://zekovulelopur.epizy.com/news_briefing_app_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7cda402-3994-4f0b-b82d-c5c3ee92c0ff/tonersammelbehlter_xerox_7855.pdfIn PDF document text
    • http://pojesonedako.epizy.com/file_psd_in.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3afdafc3-f645-44c2-971b-b248b783a9f4/que_es_la_composicion_plastica_y_artistica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a4854ec-1520-4938-abaf-0d708e6f6716/takifejisilafafuzibav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42e1717d-7cc2-4d15-aa6b-743e19b07ef2/16403813746.pdfIn PDF document text
    • http://kitavaxizajemo.epizy.com/translate_arabic_into_english.pdfIn PDF document text
    • http://tulijow.rf.gd/52528376391.pdfIn PDF document text
    • http://kutegogugilavo.epizy.com/heart_physiology.pdfIn PDF document text
    • http://zuwopun.rf.gd/dhl_international_air_waybill.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07122c4b-a78a-4f14-b4a3-28185799d277/how_to_prepare_income_statement_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad01cf76-3efa-4b28-9f54-e9dead89c566/run_for_charlotte_city_council.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d887fb6-514c-44af-a0dc-2a83a838f1cb/tagamilana.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_off0000ecda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDA 5364 bytes
SHA-256: b10ed81ae8b7e78b2d8e0ae2a33bde2bf74200d01ba1960ccf8bc47114fe325d
font_01_sfnt_off0000ff1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1F 10856 bytes
SHA-256: 01a29b4994eee53fbcc559a5fc1b1fcb92701ca970d7e03b7a9a09fbd29552db