Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3d2a7e6f4b8b701…

MALICIOUS

PDF

69.3 KB Created: 2021-09-06 20:29:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f42353aa33206c509225607ed1cc3303 SHA-1: 796b65b9cab24c5e609f93632c4d7e9ddc97cd6e SHA-256: b3d2a7e6f4b8b701a1494910ecf6b1600db2353105a50f1f46862ebdcb321d9d
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is detected as a phishing trojan by ClamAV. It contains numerous links to external websites, many of which are hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The PDF's structure and the presence of embedded links indicate an attempt to trick users into visiting potentially harmful URLs.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4922

Heuristics 5

  • 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
  • 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://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/29tl91v6tt62qiqapbmgticrej/wopunimasik.pdf In PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160a042c30bd25---46394526467.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071cb2dc939a---58416803745.pdfIn PDF document text
    • http://kawoka.com/userfiles/file/13706250464.pdfIn PDF document text
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/1203113233.pdfIn PDF document text
    • https://31app.com/userfiles/file/92807512727.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/e2b7dbdb9a002f680bd958a002a09a49/dipavoserovulegidulotive.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/5809502668.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc8cc28b0f---xokejesasepugolojiz.pdfIn PDF document text
    • http://halaljones.com/uploads/files/41406052496.pdfIn PDF document text
    • https://dammesliepas.lv/ckfinder/userfiles/files/wasopibe.pdfIn PDF document text
    • https://www.cifphosteleriayturismo.es/ckfinder/userfiles/files/15016074164.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/kebasolifivomopox.pdfIn PDF document text
    • https://pomacanthe-art.fr/imagebeforeafter/files/8767869111.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160822406e509c---14526182776.pdfIn PDF document text
    • http://cpils.com/userfiles/file/15333276723.pdfIn PDF document text
    • http://belgium-ex.com/images/blog/file/79444018626.pdfIn PDF document text
    • https://gs-hemeringen.de/ablage/userfiles/files/92788604225.pdfIn PDF document text
    • http://deckdreams.ca/clients/3/34/34055ef41782f8f15ebf372c1e39ecad/File/40514120586.pdfIn PDF document text
    • http://onlinemidias.com/ckfinder/userfiles/files/niwumolobeju.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/gijukijotedos.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/up2os689pf5nd1ps4o69vfk4c3/4136612596.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/2b2bf1627efe9fbde820af367ffe3588/susepusazasifipegamal.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/00ef5ebf5b3e56ba5aa7901cce0b549a/29273760741.pdfIn PDF document text
    • http://eaeocs.com/clients/c/c7/c75ed17bfa54634cfc1039f1b599a7e7/File/puwulexe.pdfIn PDF document text
    • http://ptkas.com/kingkong/userfiles/files/nikikofovopotabuz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=zener+diode+lecture+notes+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E7 18920 bytes
SHA-256: 19b84794da57c77f5d8b3784839a23f6922781d42b6de761980c5f021463b224

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