Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab711130f72f7db…

MALICIOUS

PDF

77.0 KB Created: 2021-05-15 00:53:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a4dbe380898e246a6159bb154f449cd3 SHA-1: ea926d86005903aa3c7cd5e93f2bb393bd6b74dd SHA-256: fab711130f72f7dbad0e8bcf65693377d49538629295a1bf7838ee21a00835e1
186 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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://botokaw.ru/strik?utm_term=windows+10+cmd+fix+boot PDF link annotation
    • http://zudepogumo.medianewsonline.com/zara_crm_case_study.pdfIn PDF document text
    • https://danimaxo.weebly.com/uploads/1/3/5/3/135388986/5855581.pdfIn PDF document text
    • https://kutowovazamil.weebly.com/uploads/1/3/4/3/134362820/vatetebosekimabo.pdfIn PDF document text
    • https://ledejikijosud.weebly.com/uploads/1/3/1/6/131607919/tuxuruzi-malijutiwulo-lovotifavilikal-jomepab.pdfIn PDF document text
    • https://cdn.sqhk.co/nimuxugemu/Bji73tg/11344772270.pdfIn PDF document text
    • https://sipedevete.weebly.com/uploads/1/3/1/4/131438766/zenifuxejituwoj.pdfIn PDF document text
    • https://cdn.sqhk.co/pofoxubo/uUxLeig/jumeraxi.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/flUqiaJ/94804351591.pdfIn PDF document text
    • https://xaweworamek.weebly.com/uploads/1/3/4/6/134610398/12f97f2c98b.pdfIn PDF document text
    • https://litezami.weebly.com/uploads/1/3/4/5/134514091/a70ce80f11db99.pdfIn PDF document text
    • https://bulugigedi.weebly.com/uploads/1/3/4/7/134714886/2118231.pdfIn PDF document text
    • https://wibugosavuzatug.weebly.com/uploads/1/3/4/3/134349607/sowitezikuvofuzolowo.pdfIn PDF document text
    • https://zudabipepapob.weebly.com/uploads/1/3/4/6/134672750/tunuvudukumiwewurep.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/1722045.pdfIn PDF document text
    • https://sowematawenuw.weebly.com/uploads/1/3/1/1/131164153/78d1b5dd1d.pdfIn PDF document text
    • https://cdn.sqhk.co/serojimo/ggU1Pjn/49725558409.pdfIn PDF document text
    • https://migapivali.weebly.com/uploads/1/3/1/3/131381101/vezafugujitel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://merovuditipin.onlinewebshop.net/minecraft_big_house_interior_design.pdfIn PDF document text
    • http://kejagabato.myartsonline.com/como_cambiar_ingles_a_espaol.pdfIn PDF document text
    • http://tipokeviti.atwebpages.com/substance_abuse_in_south_africa_youth.pdfIn PDF document text
    • http://pidodexogejax.myartsonline.com/is_diablo_3_couch_co_op.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_off0000ed78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED78 5336 bytes
SHA-256: 4ce9b1c34561b43f2243bfc392c2e18b5fc2f014cab170c358d97b07f4bd9f68
font_01_sfnt_off0000ffb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB5 11424 bytes
SHA-256: 7fc1daa5055fb858ce1f710e60cd226fb01feb07a254ac6c48646f31f4699303

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