Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b8782df37afcae3…

MALICIOUS

PDF

76.2 KB Created: 2021-03-24 16:02:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e898d21184d627188a36679e269ab6a8 SHA-1: 1af6c97c6c39d6fbb58dc30f17323f01f3431310 SHA-256: 0b8782df37afcae347c20306e84695f8e0f27b81377741c889e4a791ae92e997
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9991

Heuristics 5

  • 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 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://botokaw.ru/123?utm_term=descargar+angry+birds+transformers+hack+android PDF link annotation
    • https://cdn.sqhk.co/pabukerofo/ihuAjjB/real_steel_2_trailer_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/wenegifuteg/jficB3J/cheap_website_design_for_small_business.pdfIn PDF document text
    • http://gemuxilolo.22web.org/21534319961.pdfIn PDF document text
    • http://meetsucre.pro/joxekimogiphqzw.pdfIn PDF document text
    • http://zotegomowivin.22web.org/depula.pdfIn PDF document text
    • https://cdn.sqhk.co/vapiwibisa/hqjiMe0/63371110338.pdfIn PDF document text
    • https://xizogezoki.weebly.com/uploads/1/3/4/7/134717510/bosipixajas_duzeforafu_nipanugitix.pdfIn PDF document text
    • http://housefashion.ru/diana_gallardo_feng_shui772n8.pdfIn PDF document text
    • http://jukexufepezaj.22web.org/when_a_guy_reappears_after_disappearing.pdfIn PDF document text
    • http://daliadiago.com/3396425556437vk4.pdfIn PDF document text
    • https://torosiwetub.weebly.com/uploads/1/3/5/3/135351177/5768664.pdfIn PDF document text
    • http://discovljzg.fun/lupewevuxitamemufimi7s344.pdfIn PDF document text
    • https://cdn.sqhk.co/kesufetumo/fx8Qha6/bollywood_90s_evergreen_songs_offline_download.pdfIn PDF document text
    • https://sefubokadizafa.weebly.com/uploads/1/3/4/8/134880044/585189.pdfIn PDF document text
    • https://pobunusegem.weebly.com/uploads/1/3/4/4/134460984/turidojozem.pdfIn PDF document text
    • http://instapriz.site/launch_federal_credit_union_south_daytona_florida7eeyj.pdfIn PDF document text
    • https://bugupomulu.weebly.com/uploads/1/3/5/3/135396692/3679125.pdfIn PDF document text
    • http://libutulidux.medianewsonline.com/59839031219.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nesenavepino.epizy.com/pathological_anatomy_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf54bb72-c208-4e77-9280-ff95d9efb5b5/how_to_interpret_ratio.pdfIn PDF document text
    • http://wozimape.onlinewebshop.net/example_of_descriptive_quantitative_research_paper.pdfIn PDF document text
    • http://nolusiwafaki.epizy.com/shinchan_car_cartoon_video.pdfIn PDF document text
    • http://koxolavomuzo.myartsonline.com/will_walmart_have_ps5_in_store_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0be1d6f-3140-49be-a89f-e22174bd9d48/is_california_roll_made_with_real_crab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1a00eb8-bab1-4baa-a8f0-5a99fad75247/modesanoraketojuxi.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_off0000e83e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE83E 5708 bytes
SHA-256: 42b005f489211fcee0ee04aa5d0908e0c8c1063e30ed0735c00446e6b96a92b1
font_01_sfnt_off0000fb90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB90 11952 bytes
SHA-256: f006ae86203e289427b2c8d74589079ed126f41c2d9a374e7301e7fc0d06d152