Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffb2a94ac3771569…

MALICIOUS

PDF

84.5 KB Created: 2021-09-14 09:25:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 021ead7f4b1bdcef3a539291004a6301 SHA-1: 058b0dd4382614abcfebd346a0461007e045010c SHA-256: ffb2a94ac3771569c4309e6eba6de03ddc552c47b8f32ce33b49d2f09544898c
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm, with numerous embedded URLs pointing to various domains. The PDF structure and the presence of external URIs suggest an attempt to redirect users to potentially malicious sites, likely for phishing or malware delivery. No scripts were extracted, but the overall pattern indicates a malicious document designed to exploit user interaction with embedded links.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2990

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 http://skalamatbaa.com/userfiles/file/kafumeruxivivis.pdf In PDF document text
    • http://fxmeat.com/upload/file/ac3b8e60d7018a60a2ce383b865de31d.pdfIn PDF document text
    • https://datatech-int.com/userfiles/file/kavikubavomabax.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/36gba72g6qvqjdvndpb50vjk71/begabaxogotesixuxemofa.pdfIn PDF document text
    • http://cainghienbinhduong.com/uploads/userfiles/file/vedijuvobodukis.pdfIn PDF document text
    • https://xnkvinatimex.com/uploads/files/74553710679.pdfIn PDF document text
    • https://npkfertilizerproduction.com/d/files/gotozuvexeruwodobepi.pdfIn PDF document text
    • https://biserica-izvorul-tamaduirii.ro/files/4160752510.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/jetokuzasirewi.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16139537765374---xetigega.pdfIn PDF document text
    • http://veitali.com/upload/files/somonufomow.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161382b07e140d---80358204218.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/fudofarodezid.pdfIn PDF document text
    • https://desco.scp.hr/files/gibejejokowofojofugopa.pdfIn PDF document text
    • https://www.domaine-de-la-ferme.fr/ckfinder/userfiles/files/logewegikafese.pdfIn PDF document text
    • http://missteenqueenuk.com/userfiles/file/48740128755.pdfIn PDF document text
    • https://fibra-optica.ro/ckfinder/userfiles/files/86770270260.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/3a56a77096a8cd4851810f3476f9e540/nuxorilozemanubugomemod.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/zudowaxanukopepivi.pdfIn PDF document text
    • http://anthonyjcincottalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/17330471952.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/lalujapoviwutut.pdfIn PDF document text
    • https://marblobathware.ph/app/webroot/img/files/vijozedadupa.pdfIn PDF document text
    • https://karaari.leaddeehub.com/userfiles/files/27312176838.pdfIn PDF document text
    • https://hsse.hssanesteban.cl/files/45872526242.pdfIn PDF document text
    • https://ddmmaze.altruistictech.org/documents/img/upload/files/lipazunir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=android+keyboard+soundPDF link annotation
    • 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_off0000f313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF313 10524 bytes
SHA-256: d26722a1271f9f1d064724045277a6fb1bdcd959d22d2f6d839b5d0b56ea7272
font_01_sfnt_off00010b26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12338 19264 bytes
SHA-256: 484490ea864e67d3c79ff21699ec22e320c1e66b834ea63ad68489104d41ecfe