Malicious PDF — malware analysis report

Static analysis result for SHA-256 615a43c7a99454c7…

MALICIOUS

PDF

107.7 KB Created: 2021-07-22 12:21:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 32b35b7cee4858b8e63ceb2a6e48e741 SHA-1: e49069ffb93fb7020a33b2c99fc12b8746bf6a42 SHA-256: 615a43c7a99454c7fae6f17b39c19bab81140865278b49fef3711cf6c5b2d14b
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is a common technique for executing malicious code within PDFs. The PDF also functions as a link farm, directing users to multiple external URLs hosted on potentially compromised or disposable domains. This suggests an attempt to lure users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3906

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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
  • 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://mimpishio1bet.com/contents//files/turipuzakob.pdf In PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/65918cd12b07d4355c1a97d2d64a324e/50824028679.pdfIn PDF document text
    • http://arslanemlak.come/file/48855631794.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/talemejonudibekuxoz.pdfIn PDF document text
    • http://1night2day.com/ckupload/files/ruxokove.pdfIn PDF document text
    • http://helder-effect.nl/userfiles/file/34034998939.pdfIn PDF document text
    • http://eschool365.in/js/admin/uploadfiles/file/83920389616.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca3ef4981d---bidedokaputowejijapo.pdfIn PDF document text
    • http://skikk.be/app/webroot/files/userfiles/files/doluxajufojitu.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/gobamuwuxawi.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/1vrf36j4bnki89cssj1b1avngn/88437767044.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160818c74c0c71---13286012642.pdfIn PDF document text
    • http://hrt-foto.hu/_user/file/jafevaxezanuxap.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/a7dfccd5fee6bbb49cbb75af32272096/jovotuxono.pdfIn PDF document text
    • http://auapp.ch/userfiles/files/kakutebiratovuxeguxogil.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607812465e968---betonolodito.pdfIn PDF document text
    • http://szguilong.com/userfiles/files/12854221216.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/c8c0b96ae1b77e6318b15e40c6d0625d/31708081139.pdfIn PDF document text
    • http://keacg.com/upload/files/8285851913.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/oc0j4m1755simajvtdfgjkmkm4/mawomafogisovovuj.pdfIn PDF document text
    • http://playfromhome.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/5931631614.pdfIn PDF document text
    • http://22vek-omsk.ru/fck_editor_files/files/duzabobegibe.pdfIn PDF document text
    • https://soechi.id/userfiles/file/48547514342.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=singular+and+plural+nouns+exercises+for+beginnersPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15072 19588 bytes
SHA-256: 1ce216b485a7ef81fd90155419a8445a2bd7b098a75088b7c6bfe5bee7de02aa
font_01_sfnt_off00018303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18303 11112 bytes
SHA-256: bb2ef66bc9cdd945efb509368c4c641d89786e46bdbbbb1b32b38c59fa36a5d1

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