Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5cfd8574a594130…

MALICIOUS

PDF

68.0 KB Created: 2021-02-19 10:44:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: bef76c461b6e582082d070f5dc5f4ffd SHA-1: 69cee66ab5e08686524dbfbf60d5dc4f8dd97aa2 SHA-256: b5cfd8574a5941306b2ff43419165407e8f71325ffb8e9f13b30f6557b88f813
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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://leonvi.ru/wix?keyword=etc+element+manual PDF link annotation
    • http://ezfix.asia/carx_drift_highway_racing_simulatorlmzmo.pdfIn PDF document text
    • https://pexevirojaloko.weebly.com/uploads/1/3/4/8/134882405/zonemamujunem.pdfIn PDF document text
    • http://italiahot.space/kopoguximiwur6i66.pdfIn PDF document text
    • https://xotonibesil.weebly.com/uploads/1/3/1/4/131407892/jugejaw.pdfIn PDF document text
    • https://faxitovi.weebly.com/uploads/1/3/4/3/134379512/7637032.pdfIn PDF document text
    • http://lisolu.org/how_many_types_of_adrenergic_receptors_are_theremevfv.pdfIn PDF document text
    • http://future-techno.ru/sukojofunixizinipio8e77.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366335/normal_5ff331b579d6c.pdfIn PDF document text
    • https://xepawonim.weebly.com/uploads/1/3/0/7/130776577/besabusen_kixogibu.pdfIn PDF document text
    • http://wonder-ita.space/natri_xyanua_mua_trc_tuyngbgzq.pdfIn PDF document text
    • https://wajovojov.weebly.com/uploads/1/3/4/6/134652085/duxesagigepade_delijukegedu.pdfIn PDF document text
    • https://domirirezup.weebly.com/uploads/1/3/5/3/135382932/kelopajijilije_medukipe.pdfIn PDF document text
    • https://bivesazi.weebly.com/uploads/1/3/4/6/134652180/7746586.pdfIn PDF document text
    • https://pasezarovatif.weebly.com/uploads/1/3/4/8/134858127/nikatojilasije-garisorevolag.pdfIn PDF document text
    • http://rodsfish.club/belling_built_in_oven_manualjdnxb.pdfIn PDF document text
    • http://copyrightreports.com/red_cross_lifeguard_certification_extension_covid8cbnb.pdfIn PDF document text
    • http://interstart.online/does_bounce_dryer_sheets_repel_mice9oqu1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/how_to_make_my_own_anointing_oil.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/guxezo.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/pofujefito.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/71351170674.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/corporate_earnings_reports_this_week.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_off0000cda3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA3 4628 bytes
SHA-256: 6f9304ea400108d185110cdac9f7b78cff81824fe23f782124b775abe7885db0
font_01_sfnt_off0000dd52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD52 11136 bytes
SHA-256: 43617c00ac2f3f9d166603e6c40736b3e5a9b888691ceda374775ef25312c0c7

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