Malicious PDF — malware analysis report

Static analysis result for SHA-256 e13b7e573a77773b…

MALICIOUS

PDF

75.9 KB Created: 2021-03-13 15:47:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d84a2af709dadfa212e3a47f92dc108a SHA-1: 4ed6fa2940035a9135204fc61200dce14f062a2c SHA-256: e13b7e573a77773ba5ffedcd0468b2b06909837a765419d81c79cd8346bd8328
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('botokaw.ru') that is likely used to host a phishing page or distribute malware. The document's structure and embedded links suggest it is designed to trick users into clicking through to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://botokaw.ru/aws?utm_term=why+does+my+transmission+leak+fluid PDF link annotation
    • http://kufowawixapiva.sportsontheweb.net/html_download_w3schools.pdfIn PDF document text
    • http://moresukko.ru/rodotexazaviduso10gtg.pdfIn PDF document text
    • http://thiswaytovogue.com/small_group_guided_tours_japanfq28p.pdfIn PDF document text
    • http://mikovil.mywebcommunity.org/lista_de_verbos_en_ingles_y_pronunciacion.pdfIn PDF document text
    • http://apsdd54gfv.xyz/275497319457itvp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463279/normal_5fee406f84c62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471467/normal_6037b68925d67.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483623/normal_5fca7ff66b748.pdfIn PDF document text
    • http://interbank.link/jipinowenazesibumoz1u9dh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498330/normal_60287937aaf33.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/medaliwifufugel/11582074015.pdfIn PDF document text
    • https://11484d69-1612-41b9-9199-165df1f08223.filesusr.com/ugd/e2f197_c1537ec08a0843e18b0b6c4b1912a5d3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/acuerdos_de_convivencia_preescolar.pdfIn PDF document text
    • https://69cf8a46-0d3d-4b71-8fd1-93df925da18e.filesusr.com/ugd/e4064d_bc3ccb506a334ff4b9c43e1d3a4f90e9.pdf?index=trueIn PDF document text
    • https://c84d532c-3b33-47d6-96aa-4134a1164eb1.filesusr.com/ugd/6d45f6_967dc1e85bbb4a869c2d6bf665c1f63c.pdf?index=trueIn PDF document text
    • http://namepafubi.atwebpages.com/ncees_fe_results.pdfIn PDF document text
    • http://nabenejajoko.myartsonline.com/8918707493.pdfIn PDF document text
    • https://29159626-56e2-4eb2-a8c1-eb081f451e44.filesusr.com/ugd/a58502_2f6e5a90cbda49d893192140bbbe7c3f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nowokil/mupeseg.pdfIn PDF document text
    • https://f07eb630-23ff-4298-a1df-d7940f1ba2dc.filesusr.com/ugd/097a5b_43ca139595424ae2a6a61d556f9e9ee5.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_off0000ed34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED34 5328 bytes
SHA-256: 59ffc9676fe850e2134dcdc56f18f219aac4a4af643e2d8a4f310491fbb977ed
font_01_sfnt_off0000ff3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3C 10184 bytes
SHA-256: 3e43fa30e07e0bb6690baeeace9f479ddad46cbe33e8061cceb03eb125385728

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