Malicious PDF — malware analysis report

Static analysis result for SHA-256 05fd86e6bd28814a…

MALICIOUS

PDF

71.8 KB Created: 2021-09-01 08:10:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c294fdc57183c77423b921920283c413 SHA-1: 32817f12b76319a75cee24e89e1cf24988caca4b SHA-256: 05fd86e6bd28814af120e33c937d0ae410cfed32fe1e45649b022c584ee85767
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious Link

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to numerous URLs hosted on compromised WordPress sites, suggesting an attempt to lure users to malicious or phishing content. The ML classifier also assigned a high probability of maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/d1ac09956d5d0901c9fa8a7cd510e3d8/remobapavililug.pdf In PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/242de6a14f2087cfc4f7354dd72f119d/donidorazabidaruzifil.pdfIn PDF document text
    • https://hansenlight.com/UploadFile/files/44439888426.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/73riceku3ulrbbbppts5q60l62/xemomirigixi.pdfIn PDF document text
    • https://szalkasszorutacskok.hu/app/webroot/files/content/files/zezunil.pdfIn PDF document text
    • http://rydelko.pl/userfiles/file/49113898907.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160751676dd7b2---wixumopofixasetowija.pdfIn PDF document text
    • https://nanosoft.mn/images/content/File/gilas.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f94f5fbe7---77654864572.pdfIn PDF document text
    • http://maximaviajes.com/FCKfiles/file/80009393930.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16090a9f4996ec---15346318693.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/ki3281h8ivlg42es2mg6dt500e/16719010745.pdfIn PDF document text
    • http://toyotarent.hk/FileData/ckfinder/files/20210820_EA8F8498C3F408C1.pdfIn PDF document text
    • http://snap-drone.com/userfiles/file/67232539185.pdfIn PDF document text
    • https://alarouba.com/ckfinder/userfiles/files/gusamebizomepevuvi.pdfIn PDF document text
    • http://aow.infogestnet.it/ckfinder/userfiles/files/14331299764.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/teberu.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160934fcf66848---86422072530.pdfIn PDF document text
    • https://spa-salon.ru/ckfinder/userfiles/files/rixuzojar.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b92767ca8---fivunawezuwefem.pdfIn PDF document text
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/mekiwipe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=electromagnetic+waves+with+wavelengthPDF 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_off0000b849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB849 15800 bytes
SHA-256: 723335495a9405dc4ef4d7935dc2e2b6facc65033c476bec9f25cded42af88a4
font_01_sfnt_off0000dfff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFFF 10812 bytes
SHA-256: 359ed8e1ccb3af95907e24eb31d011fd3023809565626f84d5e937b30780b9de
font_02_sfnt_off0000f8cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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