Malicious PDF — malware analysis report

Static analysis result for SHA-256 d93ee2888189416b…

MALICIOUS

PDF

79.9 KB Created: 2021-08-16 20:38:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: b97539590bd4a3964d38f0fb7a2cac8c SHA-1: aef936bee3c0dcd9ef2a65789ea59ddd14b67966 SHA-256: d93ee2888189416bec52fa21414c2c93868cf08344645a883e7fc4f98e241a7f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/cb7c623447ad780c0e8da27b5d2ca2c5/gogosukilojukaguvubo.pdf In PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/a7lav1csigtgmnkc1ao6l0rb4m/95082356385.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c8bc9c9e881---16162697413.pdfIn PDF document text
    • https://realxenon.ru/uploads/files/50998310816.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105987a8c724---jowuzesakigemime.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/u1iu26j7jc072vo5m079thofb8/21222343347.pdfIn PDF document text
    • http://oprfhs70.com/clients/879438/File/67884364950.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/17890653714.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/kilabem.pdfIn PDF document text
    • https://actor-conseil.com/files/file/40476173292.pdfIn PDF document text
    • http://ttlh.vn/storage/ckfinder/files/54750696200.pdfIn PDF document text
    • http://raffaelecavazzoni.com/userfiles/files/50787525471.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/punusubodatuti.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/f4d34f4911ff73fde05856c9423b74f9/popixabilerem.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/59745357565.pdfIn PDF document text
    • https://campermagazine.tv/public/file/61407015190.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16090820c5b870---kuwurogewegajovisejokad.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/94okglvm8317ru3e9h24p4c7be/niforagi.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce0fb16391---jatuzavi.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/jekasavifafiledasivig.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/marufipimutisufisasiwep.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/eun98bf59uppu1c2r9uid7n1no/15661532552.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=mecanica+dos+solos+carlos+souza+pdfPDF link annotation
    • http://s250801404.onlinehome.fr/img/uploaded/file/74321371691.pdfIn PDF document text
    • 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_off0000ceda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEDA 19988 bytes
SHA-256: 00f22754d08f337cb843633eb3a890bd62bec10eed60a4103e15125cfcc52e38
font_01_sfnt_off0000ffac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000117c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C3 10668 bytes
SHA-256: 0f44da47a468152ef515b0a6530c72c020e075c38aa9ddbe26c521ce19de0d84