Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd4c7a815efff2a1…

MALICIOUS

PDF

85.9 KB Created: 2021-09-14 00:21:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 12bc218d665563ada4c9a54b1b0b75d1 SHA-1: 3c095145db6b1bca6a148c710bff7a6d3d7e17ff SHA-256: cd4c7a815efff2a170f4a91e6954a040a49be01de38b26108fb8275923ea9592
124 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV, specifically as a phishing trojan. Static analysis revealed multiple heuristics indicating the PDF acts as a link farm, directing users to various websites, some hosted on compromised CMS uploads. The embedded URLs and the overall structure suggest an attempt to trick users into visiting potentially harmful sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3778

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://losungversorger.com/product/file/40754750315.pdf In PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/e79964fc43d296618a139fe96a21e5ad/85831500943.pdfIn PDF document text
    • http://www.farmaciavictoriayjmleon.com/userfiles/files/diruxarewelojimafo.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/nifalaxo.pdfIn PDF document text
    • http://www.trisad.kz/ckfinder/userfiles/files/52643165093.pdfIn PDF document text
    • http://barexkft.hu/userfiles/file/8834501708.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/5qkagn7rt4d14hh5of34js0d10/35963349212.pdfIn PDF document text
    • http://mcrlclient.gilcom.ro/ckfinder/userfiles/files/83948831832.pdfIn PDF document text
    • https://marblo.com/app/webroot/img/files/65237375611.pdfIn PDF document text
    • http://kapsalonindex.nl/images/uploads/murulovemipaj.pdfIn PDF document text
    • https://basalyemek.com/ckfinder/userfiles/files/xufuxiwenisuwegabulur.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/5420122498.pdfIn PDF document text
    • http://wx-test.com/upload/ckimg/files/202109111743527278.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/b79cb7273744ea5e5ac0b979b4bc3ebf/79383620103.pdfIn PDF document text
    • http://cbstav.cz/file/tedisokawigujebibetiniw.pdfIn PDF document text
    • https://novsport.com/content/File/76795871816.pdfIn PDF document text
    • http://1-cities.com/blog_images/blog_/file/19590438595.pdfIn PDF document text
    • https://kampusogrenciyurdu.com/file/68390743694.pdfIn PDF document text
    • http://kodemari.info/data/files/90871350944.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/c5f3f36ebe3b10c7a934c31ec0b16b96/nuvamamuridow.pdfIn PDF document text
    • http://hrudolf.com/userfiles/68803866307.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136f3a486ae2---nilis.pdfIn PDF document text
    • https://mywayrtk.com/userfiles/file/79305177674.pdfIn PDF document text
    • https://dp-engineers.com/admin/userfiles/file/vukofamulimilaxite.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=naa+peru+surya+full+movie+online+watch+free+movierulzPDF 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_off0000fe97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE97 19164 bytes
SHA-256: e33d773af5993a8e7f6a8608110339c4d383e05d5d3822ec8c16ba9c2d12f3c7
font_01_sfnt_off000130c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130C0 11148 bytes
SHA-256: 2301b07d6eac3f05d0e0e860290bb589dfa399ff3c9065b8e3c6f6088ffb1b74

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