Malicious PDF — malware analysis report

Static analysis result for SHA-256 bea6af2787310707…

MALICIOUS

PDF

76.8 KB Created: 2021-09-28 00:36:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3408286c69828793e75dbe9d63f8b89f SHA-1: fe123a891684fea4f2cadd5ecf4b7aa99b2f1541 SHA-256: bea6af2787310707bd3494eaeb89965edbd9fcaa81e3f164d56a31741ff0c274
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to potentially compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' confirms the nature of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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 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 http://grupafurman.pl/!mag2011/userfiles/file/tejiwawal.pdf In PDF document text
    • http://prodottoitalia.eu/userfiles/files/59684403131.pdfIn PDF document text
    • https://inprovitperu.com/ckfinder/userfiles/files/47528045436.pdfIn PDF document text
    • http://chhattisgarhsanskritboard.in/sharpinstitute/images/files/nifesebogopakezuzezo.pdfIn PDF document text
    • http://honda-vo.com/upload/file/77402140979.pdfIn PDF document text
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/41516590671.pdfIn PDF document text
    • https://invision.buzyhub.com/files/wiwevurojepoxusu.pdfIn PDF document text
    • https://atlanticcompact.org/userfiles/files/jowugepamataguxuvosimo.pdfIn PDF document text
    • http://kingsshopping.abwingsmd.com/uploads/files/datot.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/3sp8sfrrid6edm27evare8th04/vinalefodeli.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/b7a7184e466ce27e4c12c50b8c9966a4/jotupimuzojobo.pdfIn PDF document text
    • https://ip-pharma.net/data/files/xitewegawiposa.pdfIn PDF document text
    • http://hrt-foto.hu/_user/file/lukujedalu.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/19540224379.pdfIn PDF document text
    • https://tfsroanoke.com/home/tfs/public_html/new/ckfinder/userfiles/files/tuvabikoxina.pdfIn PDF document text
    • http://musicandyouapp.com/webupload/editorimg/files/bevodawuwejofosi.pdfIn PDF document text
    • http://greenworx.eu/images/uploads/files/48749432631.pdfIn PDF document text
    • https://fo-prefectures.com/pages/files/dojuguraduk.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/ada3c4a0b83c7ac0dc090aabe4bb641b/tevolimasabaditalivafolo.pdfIn PDF document text
    • http://dobre-jaja.com/Upload/file/778597423.pdfIn PDF document text
    • http://limobebe.com/userfiles/files/59604029653.pdfIn PDF document text
    • https://pre-www.bridge-academy.com/uploaded/ckeditor/files/wemenabuxasizovabebimewum.pdfIn PDF document text
    • https://mepho.hu/ckfinder/userfiles/files/tivaxevuxenuvusojole.pdfIn PDF document text
    • http://archetipoingegneria.it/userfiles/files/xejumaweforuga.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/8b89c7e4e281880e5eda7168f2b81fad/lezufawolipigezetobusut.pdfIn PDF document text
    • http://dellalontra.it/userfiles/files/37873482142.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/161451ebebb2a1---sureg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=march+of+empires+war+of+lords+gameplayPDF 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_off0000c422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC422 17732 bytes
SHA-256: 5979a07ea31621da145c7e122de890109126992d9df8bc1b8591a1a3fcd5c363
font_01_sfnt_off0000f1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B3 11056 bytes
SHA-256: 7b9c821a9ff20997a3b877b1609f84f04866b30c53dc056b93061777ad244e1e
font_02_sfnt_off00010b4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1