Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aa9c7ec66fc6a2b…

MALICIOUS

PDF

101.2 KB Created: 2021-07-24 16:42:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d3090bcabf8327403192128439666dc9 SHA-1: 7630eb58bc3ee8cb472795f8a6fec9ffc6dc5f6a SHA-256: 9aa9c7ec66fc6a2b4bd17900032970005a0b84358cf6d706d66409bd774065a2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, directing users to numerous websites, many of which are hosted on compromised CMS uploads or disposable domains. The primary goal appears to be directing users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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
  • 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://danieldesignpro.com/userfiles/fukubekaxutok.pdf In PDF document text
    • https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/tcbmfrt45upt92hu05ql2ak9a0/2607668296.pdfIn PDF document text
    • http://denis-lefebvre-services.com/fichiers/file/rolojutodisedetapibatones.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/7cb3g71copj2cu8sebdha90l70/71631968429.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/73125561020.pdfIn PDF document text
    • http://studiogeologicotrilobite.com/userfiles/files/66818109908.pdfIn PDF document text
    • http://mobilephleb.com/clients/2/2d/2d2188d13063160162e6e2bbcdac547d/File/32950305880.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f13819ca4---59258138526.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/hlgda8p3sj9mo707rohfskmmup/sipomarevusibowi.pdfIn PDF document text
    • http://www.niziointerior.pl/upload/file/genelipamakonuno.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160acdce259de5---21630339754.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/6g9i4q5f5628mcpf7jvioaqop2/powanematumufuzagegalosip.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160827fbd14eac---nuruwixisusajunoxun.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/d14499460fbca1472c1b718e75b536a9/7428006555.pdfIn PDF document text
    • http://mintaialuminum.com/d/files/14349822914.pdfIn PDF document text
    • http://bacvietexpress.com/upload/userfiles/files/sozisel.pdfIn PDF document text
    • https://hostsolutions.ro/app/webroot/files/userfiles/files/wajegudex.pdfIn PDF document text
    • http://fatamorgana.fr/uploads/assets/file/rilibekupujekeviniv.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/3fbbe68bcff5d6e847eb81fa615ca64c/vubeparoxupi.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984a691f283---bibupixumujij.pdfIn PDF document text
    • https://inverpalmas.site/aym_image/files/17335632519.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/1ani19lg2v80r46o3dndm5g2vg/gibejekujemo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=transformers+revenge+of+the+fallen+%28video+game%29+pcPDF 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_off00012755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12755 11252 bytes
SHA-256: 5a666947cef816267474f3917929fa7d1542e3d734e14799bdf1d44c6186b6a9
font_01_sfnt_off00014175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14175 17284 bytes
SHA-256: e622ffc10ca71be5f7b98634bc7da8d49b58f5496e7c8eec397647e2675388d4
font_02_sfnt_off00016eb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16EB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1