Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bdd6c7dafb5ea2f…

MALICIOUS

PDF

71.0 KB Created: 2021-09-13 10:16:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4a8295de46941e98e83ea0ad339c9ade SHA-1: d7f20e5f83524c0e283db5a22f90c0ade636b4b5 SHA-256: 2bdd6c7dafb5ea2f1deb618853d6689df3d3dea4bf809fb6ee349921ca8e6817
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress upload directories or disposable hosting. These links likely serve as a link farm to redirect users to malicious content or further download stages. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://logistra.fr/ressource/site-image/files/rilotinisaxe.pdf In PDF document text
    • https://bokaichenyu.com/upload/files/81478556540.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16137e5e77c3b1---vijokuliferufikumemas.pdfIn PDF document text
    • https://mtestbd.com/assets/uploads/files/kevifowa.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137dd024de2f---pedoxavesefatuwovijuwu.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161321d75723a3---giduripogiruwedofevax.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/guu0uoclvv8kng5095jnmkbj61/86277857384.pdfIn PDF document text
    • https://moraure.net/js/ckfinder/userfiles/files/pewonurirazagasoxan.pdfIn PDF document text
    • http://corporatiegids.nl/uploads/files/35645887459.pdfIn PDF document text
    • http://dywin.com/uploadfile/files/3272767778.pdfIn PDF document text
    • http://maciejabramowicz.pl/upload/files/file/87265591598.pdfIn PDF document text
    • https://skvely-kup.cz/files/file/bopaj.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612fef48673c5---57911616187.pdfIn PDF document text
    • http://thebodyclubonline.com/userfiles/file/jetolokibofema.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/42tutab0kji8lvhpuetb49civb/32389648592.pdfIn PDF document text
    • http://favorit.pl/userfiles/file/97967678594.pdfIn PDF document text
    • http://etpatatietpatata.com/userfiles/files/85890999292.pdfIn PDF document text
    • http://michardardillier.com/ckfinder/userfiles/files/28158787450.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/96483431021.pdfIn PDF document text
    • http://cdkkck.com/uploadfile/file/20210904074939.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/fobet.pdfIn PDF document text
    • http://www.ezmoving.com/file/zubipafonowusodipil.pdfIn PDF document text
    • http://dalhousieretreat.com/cote_dor_import/admin/ckfinder/userfiles/files/nivesezinenosafoneruj.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135484ed47c4---garokosadixijakiboxo.pdfIn PDF document text
    • https://easternresources.net/ckfinder/userfiles/files/58041823967.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/pomaminafu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=dragon+ball+gt+game+download+for+androidPDF 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_off0000b6e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6E4 15272 bytes
SHA-256: 29ca1e65fac879dd6d1745245695211e433cc2265374d12efebd14d8bf676b44
font_01_sfnt_off0000dd6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6E 10756 bytes
SHA-256: 903ed9cad6800ceef4224e26c0606aac785c7a08d97a25a7af7414d29a94c538
font_02_sfnt_off0000f5f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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