Malicious PDF — malware analysis report

Static analysis result for SHA-256 20dfc7127bb2992b…

MALICIOUS

PDF

73.5 KB Created: 2021-09-12 08:06:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: bd4b736814d3c65088dff6316563e027 SHA-1: df2ea73834e3f402ac0fd1c143f58616509dfa4c SHA-256: 20dfc7127bb2992b2d8aa39615e70e50a0c8256923e7ecbb12a2810b15ebcdb7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file that contains numerous links pointing to external resources, many of which are hosted on compromised WordPress sites. The ClamAV detection 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0' strongly suggests malicious intent, likely phishing or trojan distribution. The presence of multiple links on disposable or compromised hosting indicates an attempt to distribute malicious content or phish users.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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
  • 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://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/og00e05huuvddmn45hquocvdm1/zizemesidegegufelido.pdf In PDF document text
    • https://stthomasorthodoxchurchsouthpampady.com/userfiles/file/vazet.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161314f88c372f---6580766955.pdfIn PDF document text
    • https://nirkongrp.com/ckfinder/userfiles/files/benume.pdfIn PDF document text
    • http://pastadimatteo.com/ckfinder/userfiles/files/giretuxobabadexusagix.pdfIn PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/26643725951.pdfIn PDF document text
    • https://delcinfo.ru/img/files/files/zevubezifometu.pdfIn PDF document text
    • http://phukhoabacninh.com/images/files/kuzukuxevupagaja.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613601ff42088---xuvafezonejatij.pdfIn PDF document text
    • http://asvpp.fr/pdf/24717404432.pdfIn PDF document text
    • https://branchennachweis.eu/userfiles/file/68295299072.pdfIn PDF document text
    • http://dinhvi5s.com/images/newtech/files/kulalamosedeturejugu.pdfIn PDF document text
    • http://notariocprietoa.com/notaria/documentos/files/lekirugubujiwodezew.pdfIn PDF document text
    • https://detectagsafety.com/ckfinder/userfiles/files/93056973129.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/2m4bf45oef3ifgrtmic8kf9k9k/49687200728.pdfIn PDF document text
    • http://www.atccs3.it/atccs3/fckeditor/editor/ckfinder/userfiles/files/roxewaminanakirixisen.pdfIn PDF document text
    • http://cx-gl.hu/images/files/36031473397.pdfIn PDF document text
    • http://msmzizkov.cz/data/dokumenty/kotagirolosev.pdfIn PDF document text
    • http://harmonie-avion.fr/actualite/files/67777365685.pdfIn PDF document text
    • http://appli-veolia.net/ckfinder/userfiles/files/93299840089.pdfIn PDF document text
    • https://pass-eco-energies.com/ckfinder/userfiles/files/jusen.pdfIn PDF document text
    • http://zenkatsu.dk/files/30549314275.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/nakotegevisusixu.pdfIn PDF document text
    • https://tradegateindia.com/userfiles/file/rulixupivurose.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=android+check+location+services+enabledPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD278 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8F 10748 bytes
SHA-256: 94f2d8fe50491513b8cf8eeaa3433df909ed82e217a59555d21393a5b4758bb6