Malicious PDF — malware analysis report

Static analysis result for SHA-256 d69474766860c2df…

MALICIOUS

PDF

77.6 KB Created: 2021-07-13 22:29:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c62c11feae031c4b523b6def1dc17715 SHA-1: 74b10fd93662542b3202884d3d7d342fb92c74e6 SHA-256: d69474766860c2dfa475bee9c2558f1f7cbca07bc2791f8fb36e0cabc5e82bdf
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content or phishing pages. The presence of external URIs and link farms strongly suggests an attempt to lead the user to a secondary malicious resource, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8288

Heuristics 5

  • 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
  • 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://crewmak.ru/uplcv?utm_term=correlational+research+examples+pdf PDF link annotation
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/7f1f3272671657556017cd97e8c63ae5/sepenafosa.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/06h6n5a0ft269dqffacvsemtb6/56778483985.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/2d8eee999f5f9eee586c225d12505a59/47397878366.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606eeecb57ace---gufemasivosigigejov.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/4d7d414113953ce41457207f57339688/kimodowatarovazotamav.pdfIn PDF document text
    • http://zonwering-belgie.eu/ckfinder/userfiles/files/nisusatini.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1607f719a2a0a3---wuget.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/5d29ca7fbbe02239b09529746952fbe5/mipojexex.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/6b80a77ee4c7e64a2b20ae730e74bd69/66728315237.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/c6c524446ef3663f3674937c0650429d/pusuxapolupepisetolekos.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16072333b3ebbd---zenevexosevetizubosuno.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/e5d846374a82b834a24c2f79ba30636e/gokogetoravixi.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9845e8342---83894718264.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/46196867894.pdfIn PDF document text
    • http://montrealinkwell.com/clients/c/c4/c478fb9048b4d856ed1aa16e2301f982/File/19903002187.pdfIn PDF document text
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/7aeb62e40860f749cd114e645313b305/nivugapu.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/8756867088.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160779af689093---88482742060.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096ea0615e3c---kaneduzuziliwi.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/cqqbedmp7k8k40cnq8vovs01bp/dekefevum.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160ae00b41d284---darobimixezid.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5eaf6870c---84233946121.pdfIn PDF document text
    • https://chptravel.ir/data/file/2852212680.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/pemagudo.pdfIn PDF document text
    • http://mottaing.eu/userfiles/files/zejawixalewugususali.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011dbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DBB 11016 bytes
SHA-256: 923c5f9608d67b3eb296905fcbd7900555d9ee3e2d004a73ab6ad517e32504b5

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