Malicious PDF — malware analysis report

Static analysis result for SHA-256 69f42b4556d810ba…

MALICIOUS

PDF

95.4 KB Created: 2021-08-14 05:05:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 90f3b3523e0a72754ee47b8d8ae7ae4b SHA-1: de9a50804f52222bca98aa3598bed91cb7bd164d SHA-256: 69f42b4556d810ba1f2021417e3d6ad2ff78a822ca1709cce4ad056bacdcffd6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is often used to redirect users to malicious websites. The PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicate that the document is part of a link farm designed to host or redirect to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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
  • 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.
  • 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.
  • 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://iwort.de/userfiles/file/91012915844.pdf In PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608757a098049---sideke.pdfIn PDF document text
    • http://saipanbooking.com/FileData/ckfinder/files/20210710_2E491660F75DBC2E.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/xanotedomejuzus.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/58673775761.pdfIn PDF document text
    • https://wonwon.taipei/photo/file/fuvulekaporenonepiw.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608858669c4cd---3040238434.pdfIn PDF document text
    • https://edcasys.com/ci/userfiles/files/26349225435.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f44d7c0875---84974916737.pdfIn PDF document text
    • https://imad0c0.com/js/ckfinder/userfiles/files/naxag.pdfIn PDF document text
    • https://elsa-daulte.com/ckfinder/userfiles/files/vabuzukoxotimugu.pdfIn PDF document text
    • http://atlonnuri.org/UpLoadImage/editer/files/lerolitof.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/55299357626.pdfIn PDF document text
    • http://airfa.it/userfiles/file/daxavatizonefaduwikosor.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/eebb4b0365ab44ba6d23d63a86952e38/zenaxikufo.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/004bdbd665da99df39f641674096ceff/murez.pdfIn PDF document text
    • http://gomientrung.vn/uploads/image/files/nijonak.pdfIn PDF document text
    • http://retrolondontees.com/userfiles/file/zirivimafenatogisazuvuv.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/41700103467.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608420bec56f6---lubigutudugojipefeludufuz.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086137eedbc9---depesujujokuwinuvitewu.pdfIn PDF document text
    • http://dongshengcable.com/images/upload/File/rosabazavizetoko.pdfIn PDF document text
    • https://ventadeterrenosurbanos.com/userfiles/file/gipugalutafare.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d0b75ac12---15286025905.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210719190331.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160c193f9610c4---25728459246.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=farabi+ideal+devlet+ahmet+arslan+pdfPDF 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_off00010c06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12418 20916 bytes
SHA-256: 54ac5f8110c4d07f6dd113c89fadd753c313b1fdd4335ac9e699a68d296ec23a
font_02_sfnt_off0001559f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1559F 10828 bytes
SHA-256: 3732bd2c964e7d42e7be9619910052348e66e88c15b2d76f64c7923232f686d4

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