Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f06e061cefac822…

MALICIOUS

PDF

86.9 KB Created: 2021-09-14 12:17:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 55dd03c97eef3954809215ff8ca045d7 SHA-1: 2bbce4869da282edd88c2423a61ca551875d7d62 SHA-256: 3f06e061cefac822461a354f974c36aeee476e0eb4d5d0769c145af0c31cec52
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous links to potentially compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, providing no further context on its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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
  • 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 http://globalsocialwlefaresummit.com/app/webroot/uploads/ckuploads/files/fagodenelowijum.pdf In PDF document text
    • http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/41012819868.pdfIn PDF document text
    • http://pattarasawat.com/ckfinder/userfiles/files/sejafi.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/e26059e05f45e3bbdb78a3fa1fbdbb76/27262286138.pdfIn PDF document text
    • http://groupkaishan.com/d/files/58227934185.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16134e313f39d5---tabiropufenutekanotevepev.pdfIn PDF document text
    • https://macroedunet.com/userfiles/file/nazusuziwekej.pdfIn PDF document text
    • https://molecult.metallo-tests.ch/sites/web/upload/files/genijikifusagis.pdfIn PDF document text
    • https://kalitelivideoizle.com/resimler/files/8885848474.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613f5dbc3a384---wesirepito.pdfIn PDF document text
    • http://erictex.com/ufiles/files/89000881197.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/e45kbijdg78tdmst425tnj54n6/bubotovokupux.pdfIn PDF document text
    • http://zaiger.ru/img/file/fekemutubepebuze.pdfIn PDF document text
    • http://altadirezione-consulting.it/userfiles/files/vetebuxeginenadetap.pdfIn PDF document text
    • https://media-get.ru/userfiles/files/78392261653.pdfIn PDF document text
    • http://www.39koratmachinery.com/file_upload/files/bekugomeg.pdfIn PDF document text
    • http://sambometal.com/dataroom/file/81374551144.pdfIn PDF document text
    • http://tencanpowder.com/d/files/61994655918.pdfIn PDF document text
    • http://nuitsdartistes.eu/images/file/lapuwijebarutavuse.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210904151241.pdfIn PDF document text
    • http://indcms.testingmachines.com/images/file/54862546221.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/96791260136.pdfIn PDF document text
    • http://exosushi.com/uploads/files/17797046455.pdfIn PDF document text
    • http://voyagevietnamlaos.com/hinhanh/file/85975844517.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/oqi7hk295a5oqpec54vqbinvfa/kefifukexiva.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=game+android+obbPDF link annotation
    • 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_off0000f398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF398 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAF 10276 bytes
SHA-256: 3f78679012fdbd58bf326e23c907f9ce9c84a60f4da9e07987adf74501b09cc8
font_02_sfnt_off000122ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122AE 16792 bytes
SHA-256: 0625106db47d8d512c04266e1a07e6bc883dc9f65caea5bfa91d3842e732fc54