Malicious PDF — malware analysis report

Static analysis result for SHA-256 b196d0e985a6e449…

MALICIOUS

PDF

85.7 KB Created: 2021-09-17 09:46:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 644d3e11b3a979b3248b5f322a216434 SHA-1: ac01d7b11a77d680f72747ea0bc3fe168168ce16 SHA-256: b196d0e985a6e44990b2ac9dcfa7d2e7623e1d5f5ed3c83adcb39fca6bfacb25
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ML classifiers and ClamAV as a malicious phishing trojan. It functions as a link farm, containing numerous URLs that likely lead to further malicious content or phishing pages. The presence of multiple compromised CMS upload links and disposable hosting further supports its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 https://edarky.net/data/file/dopegegabatuvesobum.pdf In PDF document text
    • http://xsjsbzrw.com/uploads/files/69722712428.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/gejoxomivojedupariranefox.pdfIn PDF document text
    • http://gillsandgeckos.com/userfiles/file/modomigako.pdfIn PDF document text
    • http://hzkontejnery.cz/ckfinder/userfiles/files/94902655431.pdfIn PDF document text
    • http://fazendasaojudastadeu.net/fotosempresa/files/putigakofa.pdfIn PDF document text
    • http://bjavc.com/filespath/files/20210905182437.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16143fe526b151---50043184721.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/3aaa63e1d66cc7b61f4630f77f875c22/lokesavakor.pdfIn PDF document text
    • http://paoladebenedetti.eu/userfiles/files/wigidegixolij.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e9a7419930---zeguw.pdfIn PDF document text
    • http://positiveforce.in/uploads/files/wiwuf.pdfIn PDF document text
    • http://ibrahimabuomira.com/ckeditor/ckfinder/userfiles/files/bivusimewireramesam.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/50265361966.pdfIn PDF document text
    • http://thoitrangvabaoho.com/Images_upload/files/navuminumadonumajatutif.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/82e2c41f62a546b567b3850988c17ff6/46577201144.pdfIn PDF document text
    • http://marleenjansen.nl/images/uploadfiles/47795611719.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612edfa25dff2---88898512487.pdfIn PDF document text
    • https://ceccardolj.ro/userfiles/file/tivesuwovusitikazes.pdfIn PDF document text
    • http://ssatripoli.org/userfiles/file/faretape.pdfIn PDF document text
    • http://foxgraphics.paulsfashion.in/files/vewoxovituzifuxifuvaj.pdfIn PDF document text
    • http://www.pacautomarketing.com/file/55470682154.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=pepi+wonder+world+appPDF 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_off0000ebe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE7 17832 bytes
SHA-256: 139815dbcb6d91e1259addc4333d539023c910f6714be50be5055cf2c56a1daf
font_01_sfnt_off00011a05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001321c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1321C 10204 bytes
SHA-256: 92cedfb1d6b1c5d899a60a7ff599b7e331ff5f00944b93fa5aab8cc9ac7c53c2