Malicious PDF — malware analysis report

Static analysis result for SHA-256 60df319f5f08aa08…

MALICIOUS

PDF

85.3 KB Created: 2021-07-07 18:15:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6b82397b864bed94b2fb1bff0b34d2ff SHA-1: 5db9c8c811f9542814c7fc1bc0527bd48d0077f5 SHA-256: 60df319f5f08aa0881b5347505230665f294a9e95f5d130c00d96b8ff76f2846
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, pointing to numerous URLs hosted on compromised WordPress sites and disposable domains, likely to distribute malware or phish for credentials. No scripts were extracted, but the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/17ff97f1d8515c04c9bacda06d7a8787/38728382523.pdf In PDF document text
    • https://iwnta.com/userfiles/file/nulojorifitu.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/xapavofev.pdfIn PDF document text
    • https://businessservicesuk.com/userfiles/file/paziveluvetabedurulani.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160874a833c297---5853357496.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160d2d83fd3d78---gelalukadapudige.pdfIn PDF document text
    • http://urbancollab.com/userfiles/Proj_Name//files/lupuxof.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e02211b91ac---74415295675.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/5993e20a57ad6f30d31c9c12a99e6215/kejisemew.pdfIn PDF document text
    • http://elskenecologie.nl/files/47327948023.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/73281269371.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160787741bc28e---60337665895.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0446134001621898390.pdfIn PDF document text
    • http://kotolantopeni.cz/file/39869447983.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/75b28d20916322954e93ed478034b367/bavodoluzez.pdfIn PDF document text
    • http://catgarner.com/clients/873270/File/dopakobariwadipe.pdfIn PDF document text
    • http://bizbecho.com/pa/trainstation/uploads/image/file/sojagel.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/200f7aed2a4f71574db36460ec820dc7/lojugesedusetazibodofiza.pdfIn PDF document text
    • http://nensi.si/upload/file/93389072681.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/xumat.pdfIn PDF document text
    • https://kozhikodedeaf.org/admin/my_files/file/54869421007.pdfIn PDF document text
    • http://atek-ent.com/upload/file/fefunomarifuwa.pdfIn PDF document text
    • http://kozszemle.hu/uploads/files/toziwatobarozarewup.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16072464954b09---fadirisew.pdfIn PDF document text
    • https://aljuboori.com/userfiles/files/mimisobajugurup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=speculation+in+historyPDF 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_off0000ec79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC79 16432 bytes
SHA-256: e0af76a9089186eda4e75b970ff9d2ee8a7535c7e671c786259dcefd5abb5dd8
font_01_sfnt_off0001171b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1171B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F32 10760 bytes
SHA-256: e8912230af37389f0e5953877fb08adea60ad20618f4d3c161af2770f1587494

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