Malicious PDF — malware analysis report

Static analysis result for SHA-256 d551172a8ecdb154…

MALICIOUS

PDF

82.1 KB Created: 2021-09-05 09:08:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8925e7ecf3548e0fc5e212a02e71c016 SHA-1: 667bce780a5d3e61f6c29424f743b9e116c7a503 SHA-256: d551172a8ecdb154753f6be09582a03122082d06f781ac224353d76dc46db411
164 Risk Score

Malware Insights

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

The file is a PDF document that contains multiple links to compromised websites, suggesting it is part of a phishing or malicious download campaign. The presence of a 'download button' heuristic further supports this, indicating a lure to trick users into downloading further malicious content. ClamAV detection and ML classification confirm its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/8fdnmd9rt5jbve0v63bicjmcm5/41864497518.pdf In PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/fars6mpuqfr4hqjhjq41kctt79/tevipitixorufifula.pdfIn PDF document text
    • https://kheops-so.fr/ckfinder/userfiles/files/8720997685.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/fagonufipapusu.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/dovixorov.pdfIn PDF document text
    • http://headlinesdinerla.com/uploads/files/92771422502.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/nusefojob.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/e23d02c34bc8a73881c94e51899950e5/29183721365.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/rn0jo4oqpok8j0cq9jprvmrk2m/liwopibifojuwiruditidaso.pdfIn PDF document text
    • https://pediatricpotentialsnj.com/PP/PPpng/files/pixuxukajamoberu.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c575fbdda23---6035622336.pdfIn PDF document text
    • http://lezeckastenakosice.sk/upload/files/80706169919.pdfIn PDF document text
    • http://khautrangkhangviet.com/upload/img/files/fadezoletelevoxemogadebi.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160adf42dc198e---36274228151.pdfIn PDF document text
    • http://abbwingslynnhaven.com/uploads/files/pavimerusivo.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3324d5c32---98901021837.pdfIn PDF document text
    • http://archerelectricsupply.com/userfiles/file/811731746.pdfIn PDF document text
    • https://kga-am-adlergestell-ev.de/kga/ckfinder/userfiles/files/14199955487.pdfIn PDF document text
    • https://cakenflowersonline.com/userfiles/file/33455893091.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f190511a895---xogowamiluvagolisujujufud.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8bbdd1277---ruvasabekepomunok.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/66062346263.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070ce608694e---didemogezufilemubofirukug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=ielts+academic+reading+practise+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CE 17868 bytes
SHA-256: f98280ba1ba9784fef3a2e8d3dc54e7f8cccd20b4602de722cc0cf3913d72466
font_02_sfnt_off00012262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12262 10792 bytes
SHA-256: caea9e65f6a383b0cfa785b108c30a023444d19a23b1ccf4582fc9f17bc379d9

Open this report in the interactive analyzer, or submit your own file for analysis.