Malicious PDF — malware analysis report

Static analysis result for SHA-256 8965ee0eb4fe2953…

MALICIOUS

PDF

83.1 KB Created: 2021-09-08 01:47:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 22d9be6bfea08e91bcf5804a96f5bfdd SHA-1: 6b11b4df9038a99d3431c6911ad5efc55d732da9 SHA-256: 8965ee0eb4fe29539ac02c6baf1874a041462e637e9e9158806589481d51fa04
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and a large number of external URIs, many of which point to disposable hosting or compromised CMS uploads, indicating a link farm designed for SEO poisoning or phishing. The embedded JavaScript likely facilitates the redirection or further malicious activity. ClamAV detection as Pdf.Phishing.Trojan further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://tavio.su/files/file/figujazomisidetegonataj.pdf In PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/4eqnpr5tbbkgor902sl7d5fp35/bolitegazevugutonadopexe.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/16115c59b8111c---20335406301.pdfIn PDF document text
    • https://nasroglobal.com/userfiles/file/sukeposuxo.pdfIn PDF document text
    • http://p-itos.net/admin/userfile/image/file/mituxaradadetizikovezojur.pdfIn PDF document text
    • http://ronaldtan.nl/images/photo/86709093583.pdfIn PDF document text
    • https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/ed84cb3a51ef8e6c3e6998ed3578fca3/nusarexor.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/86f6f3d8edf923754f29d23e706a54f0/10336350905.pdfIn PDF document text
    • http://sambometal.com/dataroom/file/20499400157.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf94503ba11---37699584277.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/5ebbee0880888cb54523ff1796610c9e/telidigosi.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/a9b0ab2175d09412ecab92c23a7c37eb/15462000880.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/5e3phtrti9id1463f6n4i7cgn8/tuxatiganapap.pdfIn PDF document text
    • http://anvlaw.com/userfiles/file/62354281709.pdfIn PDF document text
    • http://grandrosso.com/js/upload/files/15225904891.pdfIn PDF document text
    • https://dcimx.com/files/ruwabivifuzuliz.pdfIn PDF document text
    • https://sanidom.pl/img/file/muwovizo.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8bc2a7e7cf---2839672321.pdfIn PDF document text
    • http://marienoellebermond.com/img/uploaded/file/83348859610.pdfIn PDF document text
    • http://staropolski.net/Upload/file/66275938853.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/psm0q4eopialoj582ab1npebe7/49332775803.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/h0019joidblsv1sl6fim4s9lff/vodirirupigawa.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd0aa0cb80---nasowuf.pdfIn PDF document text
    • http://4seasonstours.in/userfiles/file/gidigotatigolok.pdfIn PDF document text
    • http://thechitay.com/uploads/userfiles/file/datukuverowinovorirebo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=sandpiper+diaphragm+pump+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_off0000dfb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB9 10628 bytes
SHA-256: f6090e185473fcb0afbf4a60fb532d54e598fe536962f1c0f4594a2208573511
font_01_sfnt_off0000f78a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF78A 18148 bytes
SHA-256: 7f689d3f22b707c96c0cc4d1e8c821b7c32fd5ed24ed2eba005ad0e524492b31
font_02_sfnt_off00012642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12642 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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