Malicious PDF — malware analysis report

Static analysis result for SHA-256 2044778fd17fbbd9…

MALICIOUS

PDF

75.5 KB Created: 2021-09-21 06:22:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: 74e36ee9533837ec4429ca27c7734100 SHA-1: 2f0e348bdd1348f06fe786267988691e987942b4 SHA-256: 2044778fd17fbbd9f1c8e862cb714b432e5e486dd0d020e5cece2ff8c35b8b21
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicating it functions as a link farm. The embedded URLs suggest an attempt to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5364

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://catamma.ru/uplcv?utm_term=android+task+switcher PDF link annotation
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141f43371ec3---modemotunezosufunejizowim.pdfIn PDF document text
    • http://studio-castiglioni.com/userfiles/files/4422396752.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/pofarufirafilanufixuvot.pdfIn PDF document text
    • http://balletpanov.com/uploads/files/78542691699.pdfIn PDF document text
    • http://lammensfilip.be/uploads/files/xuvotareroponufugevop.pdfIn PDF document text
    • https://seikai.jp/free_images/files/73962725919.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/35e7c3b61dc3d19aa0ae50e8daad703d/rogikub.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/02d3b0d91aae477f5506cc10cfc799fe.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/6e5b0db7259708579ec05cae803d281c/98863202965.pdfIn PDF document text
    • http://carrozzeriardue.it/userfiles/files/xibajupokerevoguduj.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/63475429497c738445eff480af594c5d/nupubudivumurazopibog.pdfIn PDF document text
    • http://precisao.net/files/files/kovizuxorawarinalife.pdfIn PDF document text
    • https://www.asoriofrio.org/ckfinder/userfiles/files/fevogilutobotekadixim.pdfIn PDF document text
    • https://petribax.nl/userfiles/file/nizanenoxitopu.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/tolojam.pdfIn PDF document text
    • http://novena99.com/uploads/files/202109121402439989.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/mutiguwedevuwapujijurog.pdfIn PDF document text
    • https://hotlinepro.in/admin/userfiles/file/10082291570.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/tetelojedivevi.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16143d065c65d8---87408161895.pdfIn PDF document text
    • http://honmamon-s.com/img_seminar/userfiles/file/6549155594.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/a7ndalr3uvdb3a39bu1go2lch4/fulositen.pdfIn PDF document text
    • http://denis-lefebvre-services.com/fichiers/file/79037301641.pdfIn 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_off0000d539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD539 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED50 10580 bytes
SHA-256: 5e661fb2bc630a663c1d1bb3cbe89a39be0a2b1a30f28f45dee6abfac4c81ff1
font_02_sfnt_off00010586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10586 17780 bytes
SHA-256: eb1d6fdd788322fdab4083b2923ae3e5900bae2e6fb4c1b40ff191b7a051fc72

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