Malicious PDF — malware analysis report

Static analysis result for SHA-256 60b6c3ad297f4ea9…

MALICIOUS

PDF

86.2 KB Created: 2021-09-04 22:50:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e1a3b80292d0dbe9a40b739295237f37 SHA-1: 38af669e8f71f73afcc65928e161319fac458ece SHA-256: 60b6c3ad297f4ea9b658103570b4745d736e721fe36b8648ba2f0481c1f34b7e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file functions as a link farm, directing users to numerous external URLs, many of which are hosted on compromised WordPress sites or disposable domains, suggesting an intent to lead users to phishing or malware-hosting pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • 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 http://theettiaresottawa.com/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/xogovigavefejam.pdf In PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16094e2810c048---35043696422.pdfIn PDF document text
    • http://zonweringbelgie.eu/ckfinder/userfiles/files/fidowunugew.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/35098538046.pdfIn PDF document text
    • http://nt-module.ru/ckfinder/userfiles/files/foxojebejux.pdfIn PDF document text
    • http://gtshotel.it/images/file/2845033846.pdfIn PDF document text
    • http://donovaly-ubytovanie-safran.sk/web/userfiles/file/movasuxebasatusezo.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/36999998992.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/2lqfu90l86b9uvl1tla5cjkv33/67235689309.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/be51f24f1fce15260cec2202ddab1b76/45256811084.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/161179997855a0---wagodobabalikuvakegajax.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/fj0j5klj06m1okmidj3ekiujmu/28561422930.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/47a00d33920df57fb9891d62421bc274/78976030914.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/16073ffdb3180e---58914660147.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608ccc6fb6168---kuvifu.pdfIn PDF document text
    • https://chief-moving.com/editor_upload/file/relanawededavupuxetuk.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/tmp/fuvakumemageteregegu.pdfIn PDF document text
    • https://iskoruma.com/upload/ckfinder/files/99063216672.pdfIn PDF document text
    • https://alajuusa.ee/media/contents/file/21078438962.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/161127746989f0---lifonudubopukawu.pdfIn PDF document text
    • http://fotosvatba.net/userfiles/file/lapeboxuzowi.pdfIn PDF document text
    • http://ceramicaartisticamarsalese.it/userfiles/files/63023175617.pdfIn PDF document text
    • http://zubrcup.by/files/files/50626082692.pdfIn PDF document text
    • http://alvirne88.com/clients/71477/File/84859728785.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=mdb8989shz+user+manualPDF link annotation
    • 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_off0000eac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC1 18116 bytes
SHA-256: 2cca68e69233415aae72803025d1eb6b2e0d0f3e90e1ab556cebebebb868bbb0
font_01_sfnt_off00011a23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A23 10872 bytes
SHA-256: f3e504aa6b0ea971a75b9842afebb7708a432f429b92e01309005417f54eab3a
font_02_sfnt_off00013322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13322 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1