Malicious PDF — malware analysis report

Static analysis result for SHA-256 10135b1331efc8b8…

MALICIOUS

PDF

76.8 KB Created: 2021-07-31 14:04:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a6a97d948728350e9fa5d083899f6a5e SHA-1: 814bcb18cd8520323cb6c59ca391df75795fa880 SHA-256: 10135b1331efc8b8bff97612e8c63e0346e45c60c1cbc73ec29bab30edeb2c63
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to redirect users to malicious websites. The heuristics indicate that the PDF acts as a link farm, pointing to numerous compromised CMS upload locations and disposable hosting sites. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature, suggesting it's designed for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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
  • 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://coretry.ru/uplcv?utm_term=minn+kota+i+pilot+manual PDF link annotation
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/d1743cae3d25ef0d8a286b0b7c99cdfd/somarivipofixeniri.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/87468632061.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be8fe54b0a0---79393655818.pdfIn PDF document text
    • https://aymsoft.us/aym_image/files/40680914440.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4320c7976---95720853245.pdfIn PDF document text
    • http://sbstroy53.ru/img/files/975080354.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/8c39ab5d1d416adf55049e221b03813f/21064422845.pdfIn PDF document text
    • https://orsam.org.tr/paketler/ckfinder/dosyalar/files/gotapeladukimafamevabege.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/82d977ca127419bccbadc498db570597/fulebexuvixuk.pdfIn PDF document text
    • http://ikuma-car.com/js/upload/files/mudivijiwubijipobatuzarij.pdfIn PDF document text
    • http://iltorg.ru/upload/file/70978646819.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/c872781e09535fa4b2028cf7f1f87708/dolamo.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/norumubinizozimu.pdfIn PDF document text
    • http://goreskyreunion.com/clients/b/ba/ba087d28c24afe6c5bc45fa062332e47/File/69096401864.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/88705747969.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/69918650895.pdfIn PDF document text
    • http://owtsreunion.com/clients/e/e7/e717deb27d844c69ffc49b2d3c0bb1a5/File/ramajapadudujejusukijamot.pdfIn PDF document text
    • https://auto-rujo.com/images-editor/file/92733041263.pdfIn PDF document text
    • https://miguktour.com/FileData/ckfinder/files/20210730_A8707E1A13B7D330.pdfIn PDF document text
    • http://bienbao.org/uploads/files/nodopadunezodafikip.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/2aa15b657f5567646bbb8afd4ae00297/68614700677.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/72218199491.pdfIn PDF document text
    • http://ksnjl.com/userfiles/files/2430293178.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c201463fdd9---77702256665.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/9ca28199c244fcdd7a891ab961a0c058/14342712523.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_off0000c910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC910 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE127 10196 bytes
SHA-256: dddf8578f3182235d5ca43a00d77e5141ad83ed8d45e3bac1fd52e4d47b40b5d
font_02_sfnt_off0000f7ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7EA 17408 bytes
SHA-256: 31b49493afc6e2f139e79f66afa5ae831662dc3aed67e68062ddff9b42b26de0

Open this report in the interactive analyzer, or submit your own file for analysis.