Malicious PDF — malware analysis report

Static analysis result for SHA-256 da3c95418d325d6b…

MALICIOUS

PDF

85.4 KB Created: 2021-09-20 06:29:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e688cec620c6ab3b424db69b0cc4431b SHA-1: 85706a577e07e81ae29e2fe28d04c7aeb820b1ca SHA-256: da3c95418d325d6bb945ca866d271a85db0e6c119d2edaea0def6f2ed05b40e2
196 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML models and ClamAV, and exhibits characteristics of an advance-fee scam. It contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, likely intended to redirect users to malicious content or further phishing pages. The document's structure and content strongly suggest a fraudulent scheme designed to trick users into paying fees for non-existent prizes or parcels.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://studiovalecchi.it/userfiles/files/84894302873.pdf In PDF document text
    • http://bora.su/ckfinder/userfiles/files/nobadesodavulogelemegomix.pdfIn PDF document text
    • https://taichielite.com/louis/taichi/ckfinder/userfiles/files/junikixoxes.pdfIn PDF document text
    • https://leise.ru/admin/ckfinder/userfiles/files/1604329610.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141750b07b0c---doxusi.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/7477815b1a7e8baf53f65f6d5e0569b7/51212364186.pdfIn PDF document text
    • https://pharma-tools.pl/galeria/file/30303091518.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/zofam.pdfIn PDF document text
    • https://vinatech.com/userfiles/file/nukirigolepijenuvigo.pdfIn PDF document text
    • http://dulwichtaxi.com/survey/userfiles/files/zobazubi.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141bb6e2578f---7095248856.pdfIn PDF document text
    • http://citescolairedeledit.com/include/file/zitumovab.pdfIn PDF document text
    • http://reclameindex.nl/images/uploads/buzalam.pdfIn PDF document text
    • http://vngo-cc.vn/cooker/public/files/84817666563.pdfIn PDF document text
    • https://snowcat.pl/admin/ckfinder/userfiles/files/75892089702.pdfIn PDF document text
    • http://1hozain.ru/files/userfiles/files/87049518496.pdfIn PDF document text
    • http://www.mecateengenharia.com.br/ckfinder/userfiles/files/79719186267.pdfIn PDF document text
    • https://e-tta.com/app/webroot/userfiles/files/bimawupexabategipefesa.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/7819064663.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e4f4c1254c---gurabamorafeso.pdfIn PDF document text
    • http://ikhmongol.mn/ckfinder/userfiles/files/11417269788.pdfIn PDF document text
    • https://www.studiorosaliabusco.it/ckfinder/userfiles/files/fipakotanokasejulajin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=ragnarok+origin+global+apkPDF 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_off0000e404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE404 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC16 19412 bytes
SHA-256: e8bbada8adeecbc76e502ebdbaff89fd8cf86038ade72def4cf1bb2a92f41780
font_02_sfnt_off00012fc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC7 10304 bytes
SHA-256: 514c4dfe87466368ddb7fa67c5200af4d69ef9f7e804615f6881d715ad13dda8

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