Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8ddb742f67c2709…

MALICIOUS

PDF

92.2 KB Created: 2021-09-15 18:59:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7c6c05b4f2265f39658f23e69bf08fbd SHA-1: 0999772323f25023759da16b0a91badebf35e365 SHA-256: e8ddb742f67c27094f8105a45a71b4aa600340a6262a009b442bf497c026386a
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and multiple external links, some hosted on compromised CMS platforms, suggesting it's designed to redirect users to malicious content or initiate downloads. The presence of a visual download button and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a phishing or malware distribution attempt. The embedded JavaScript is likely used to facilitate these actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 9

  • 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 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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.
  • 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://irlanc.ru/uplcv?utm_term=galaxy+hd+wallpapers+for+mobile PDF link annotation
    • http://albertopizzetti.it/userfiles/files/xavuzinolarawidanijipuri.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///24349990698.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/mc81vcpr1q15po87c0k9rssgbk/vugirewoxolomisik.pdfIn PDF document text
    • http://word.mn/uploads/assets/72748926427.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613334e266af8---25354551072.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/r2suucsjf44bqo37bhspkg0r21/29009784445.pdfIn PDF document text
    • http://www.lasallelille.com/admin/ckfinder/userfiles/files/jubezewikuva.pdfIn PDF document text
    • https://drishtinetcom.in/FCKeditor/file/zetufewenuzenov.pdfIn PDF document text
    • https://jck.ro/userfiles/file/42875653599.pdfIn PDF document text
    • http://4x4autok.hu/userfiles/files/82736133460.pdfIn PDF document text
    • http://ecohouse-lab.com/userfiles/file/53351707.pdfIn PDF document text
    • http://mbeautyconcept.com/upload/content_images/file/lezomogadarob.pdfIn PDF document text
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/93971249679.pdfIn PDF document text
    • https://avukatwebsitesi.trakyasoft.com/upload/files/96755993249.pdfIn PDF document text
    • https://orangerun.re/photo/files/safoterixene.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130677612454---xobuxatok.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/rudutuwirawom.pdfIn PDF document text
    • http://skyrun-arser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210905055543732738dfxkvf.pdfIn PDF document text
    • http://gesundezellen.de/neu/userfiles/file/palofowiboluzesi.pdfIn PDF document text
    • http://denprokhorov.ru/images/file/77230834448.pdfIn PDF document text
    • http://wish-pharma.com/upload/files/nofufukujanom.pdfIn PDF document text
    • http://harrodsrentacar.com/public_html/userfiles/file/58761409751.pdfIn PDF document text
    • https://sweetburden.com/upload/users/files/pivupu.pdfIn PDF document text
    • 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_off000102c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011add.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ADD 11040 bytes
SHA-256: 221e1c115257ed64a17199125c4d873c3ce72d1c64edc6827742bcef1b332749
font_02_sfnt_off0001346e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1346E 17948 bytes
SHA-256: 14409b0032cf17f6f9d3edf35d4ae07f6537b4dd99cd35a3d9d2ca98e2d951c1

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