Malicious PDF — malware analysis report

Static analysis result for SHA-256 2234f0124f0e0059…

MALICIOUS

PDF

70.1 KB Created: 2021-09-26 16:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 50f8ca62984699ca266f04e5d47e20c1 SHA-1: 0d81de7068ef374743a2b77aa64dceda49fccec2 SHA-256: 2234f0124f0e00599c5a1257dd5419c114f250dacda00b3ad679f450977c68b9
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many hosted on disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to malicious sites or the download of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://crewmak.ru/uplcv?utm_term=modal+verbs+permission+examples PDF link annotation
    • https://loyalangkorapartment.com/userfiles/file/76749627928.pdfIn PDF document text
    • https://seeandhearbetter.ie/img/shop/contents/kipupu.pdfIn PDF document text
    • https://www.southdownscellars.co.uk/ckfinder/userfiles/files/zediwuridememavipal.pdfIn PDF document text
    • https://saintarseny.ca/sites/saintarseny.ca/files/file/48604681205.pdfIn PDF document text
    • http://ride-on-earth.com/images/blog/file/kadex.pdfIn PDF document text
    • https://www.ventisilva.com.br/ckfinder/userfiles/files/13558237643.pdfIn PDF document text
    • https://tspinstruments.com/cache/fck_files/file/bupotapejafutiduvepugijur.pdfIn PDF document text
    • https://www.willmarshelter.com/ckfinder/userfiles/files/15134362591.pdfIn PDF document text
    • https://rizecanreklam.com/images/file/ruvedazenawedidedifexul.pdfIn PDF document text
    • http://baheth24aqari.com/ckfinder/userfiles/files/mizorawose.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/32731678499.pdfIn PDF document text
    • https://skvacations.com/userfiles/file/ruvupevupivijuz.pdfIn PDF document text
    • https://www.fibertech1.com/my_content/js/ckfinder/userfiles/files/33837722993.pdfIn PDF document text
    • http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/tapufugetupuxasasigeji.pdfIn PDF document text
    • http://cloudinfo01.smartevolve.com/images/ckeditor/files/95581428506.pdfIn PDF document text
    • https://willes-gb.com/uploads/files/202109072254164307.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/4c335c659bb57966cce64b4db6e0ac57/33235040433.pdfIn PDF document text
    • https://legend-chang.com/UserFiles/files/jujiregamibasazefojud.pdfIn PDF document text
    • http://gianenricofabro.com/userfiles/files/rovukukunomuvapomamus.pdfIn PDF document text
    • http://italianopizzeria-pg.com/uploads/files/34681871128.pdfIn PDF document text
    • http://jullien38.com/ressource/site-image/files/verupadaf.pdfIn PDF document text
    • http://detskaoptika.cz/ckfinder/userfiles/files/refegulal.pdfIn PDF document text
    • http://suvenirzp.com/uploads/files/54651027208.pdfIn PDF document text
    • https://cheesykeju.com/contents/files/rusurasorotadujijikab.pdfIn PDF document text
    • http://bobiniauto.com/userfiles/file/vovuvubivofuz.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/rufer.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB271 15764 bytes
SHA-256: ae9b7a5fe4ddd609f961e87d70021d4e7e075839ab5c3557871ca562a51d35ca
font_01_sfnt_off0000da20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA20 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF237 10756 bytes
SHA-256: 368c8bebb59644855a8e5178cc77ddaea31cd073cb589302cba01d84400d7823