Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b012eb40ecc147a…

MALICIOUS

PDF

73.4 KB Created: 2021-09-03 09:30:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 602a43214568dd007c8f43568512cea5 SHA-1: 23d083721e06549ddea610fb9f4346e039dedf6b SHA-256: 6b012eb40ecc147a6534d765188184c44998ba7af163d10d886b2db2aea5ae1b
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable hosting. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent, likely to lure users to phishing sites or download further malware. The file's structure and numerous external links indicate it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4683

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bunny888.com/ckfinder/userfiles/files/tikamivimivezu.pdf In PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bf3ffa9b90f---72889655455.pdfIn PDF document text
    • http://goodfortune.hk/UpLoadFile/file///47957641372.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/dc26422e4b7a7a820d7590769d4290c5/70195431735.pdfIn PDF document text
    • https://akrmedia.no/ckfinder/userfiles/files/98116683185.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad4a0e21ec---4496052651.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/9jfgpv8egsqjju7pg5vgudusv6/31704284235.pdfIn PDF document text
    • http://ridendo.cz/files/file/nunoxulup.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9fc1ac54e7---fusijevodepu.pdfIn PDF document text
    • http://dogalakustik.com/depo/sayfaresim/file/majewurur.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/519d291ab1fc1d54e908342f9a6921d9/7284331064.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/suteguzuduvofevabumuf.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074ade17fcc5---30155435287.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0112206279---gilefaketitebixa.pdfIn PDF document text
    • https://ms01bet.net/contents//files/86238884282.pdfIn PDF document text
    • https://apotekatia.ba/fajlovi/30624741964.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/jrbbu415memfv08esmlufp5e2l/datojumafonabazisipuboboz.pdfIn PDF document text
    • http://decom.pro/admin/ckfinder/userfiles/files/vafatamawabinede.pdfIn PDF document text
    • http://ebbers-schilderwerken.nl/uploads/files/98769187082.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a5eec8d8298---46667180273.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc8ef14fe98---gufobujopuloj.pdfIn PDF document text
    • http://conflictfreeelectronics.com/ourprojects/chowki/UserFiles/renuka/file/29816351926.pdfIn PDF document text
    • http://sakem.org/userfiles/files/tifadesojogupipubazufis.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/161107a78905c3---logeduk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=ielts+writing+band+9+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000daa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA2 17732 bytes
SHA-256: ff94ca9406ca76b2e8c547c974036c17cc3b8b3e9bf1025ca637bd702a84e3c5
font_01_sfnt_off0001074b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1