Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e839fa01e430978…

MALICIOUS

PDF

74.3 KB Created: 2021-03-18 05:44:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: eca0c292b3b58fb4a5d7b8864d65853a SHA-1: 8e939142ea37d648bc8a5cef35483dc61415e466 SHA-256: 0e839fa01e430978f086ded91bad6ea079e0e91a0cac665ad0a27290e905e04d
194 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dugedepap.ru/wix?keyword=saxon+math+pre+algebra+answers PDF link annotation
    • https://wufipalowev.weebly.com/uploads/1/3/4/5/134595621/mivikulafo.pdfIn PDF document text
    • https://vopilexazum.weebly.com/uploads/1/3/2/7/132740267/dapogalirariz.pdfIn PDF document text
    • https://zipiluzus.weebly.com/uploads/1/3/4/2/134234939/lexerezugid_bedab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370273/normal_604626960788e.pdfIn PDF document text
    • https://fomodefoz.weebly.com/uploads/1/3/5/9/135958111/losufopewabapo-gutulifurugikil-xiratafejes.pdfIn PDF document text
    • https://cdn.sqhk.co/mafowixodi/hhXTSjc/voltage_drop_calculator_wire_size.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416660/normal_604d2ad97e905.pdfIn PDF document text
    • https://cdn.sqhk.co/vefomatakin/jB3ijgi/puzzle_bubble_game.pdfIn PDF document text
    • https://cdn.sqhk.co/demapibo/dKgeWty/83971208674.pdfIn PDF document text
    • https://fapotuseji.weebly.com/uploads/1/3/4/7/134712372/kixevuwuvaduxozaj.pdfIn PDF document text
    • https://vesukinixemijuw.weebly.com/uploads/1/3/2/6/132696016/nezigebizejuv-xaveviworew.pdfIn PDF document text
    • https://bowutemol.weebly.com/uploads/1/3/4/2/134234741/634665.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465263/normal_6036e0be1b840.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421957/normal_60414677f2239.pdfIn PDF document text
    • http://moxilekulina.getenjoyment.net/jaremametaxom.pdfIn PDF document text
    • http://takaweri.mywebcommunity.org/20832175605.pdfIn PDF document text
    • http://zijafanovidiz.sportsontheweb.net/57299200787.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481155/normal_600406d0e65ee.pdfIn PDF document text
    • https://kofivenemiwelew.weebly.com/uploads/1/3/1/3/131380814/ed2c8a3a752c7.pdfIn PDF document text
    • https://binapesod.weebly.com/uploads/1/3/1/4/131438069/gibiwa-leluge.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ed59cdd8-0d75-4634-8bb2-7afdb9da103e.filesusr.com/ugd/9cb112_ef03020354e6418a8202556a38ed520f.pdf?index=trueIn PDF document text
    • http://rorokepu.atwebpages.com/artaud_van_gogh_le_suicid_de_la_socit.pdfIn PDF document text
    • https://a2ae8793-a99f-480d-a3bc-849ef63d34f7.filesusr.com/ugd/cc207a_046228906b8546f595dac516a511ac00.pdf?index=trueIn PDF document text
    • https://41c240d9-b4af-4f88-8fa4-2a41cce3a287.filesusr.com/ugd/01bc73_3279499d1484447eb769eb79c8b1631d.pdf?index=trueIn PDF document text
    • http://bidusibebawuz.onlinewebshop.net/what_is_the_largest_ship_in_starfleet.pdfIn PDF document text
    • https://4bd9ed84-c80b-4837-bb2f-b1353ebfd8aa.filesusr.com/ugd/5a1791_925c0b2351284a8897a3633a3efbc764.pdf?index=trueIn 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_off0000e574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE574 5636 bytes
SHA-256: c2e48b7646567d48beaba9edbfb43eaffebda1aa48f2a12cb73679d40bc56ef7
font_01_sfnt_off0000f882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF882 10256 bytes
SHA-256: 0e3d8df2e617065b975690d3754d283386ea0830a7027e6f063e537cb21f1c02