Malicious PDF — malware analysis report

Static analysis result for SHA-256 c30130865c14ca0c…

MALICIOUS

PDF

76.2 KB Created: 2021-09-07 08:13:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f718435738276c60e9cd01b7f0839edd SHA-1: 77335ec873b636e612da3ccaf4c883cf98fd0d94 SHA-256: c30130865c14ca0ca7f838330ee8d175178e958f48a64f9956f5b867736e8321
124 Risk Score

Malware Insights

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

The file is a PDF containing numerous links, many of which point to compromised WordPress sites. The ClamAV detection as 'Pdf.Phishing.Trojan' and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a phishing or malware distribution attempt. The document body is unreadable binary data, suggesting it's not intended for direct user interaction but rather to host malicious links.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3999

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://leilehua76.com/clients/4/4d/4d80c013f15dbe3c797666a457780dca/File/pirimediwufed.pdf In PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/0ae152a80a487df668759bec359636f2/jijajibalive.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/8cd1ddb43b2ebc3c8e389cf40f5efd01/73401781632.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9cf48c5ff45a91a1f5e45bf2aad0878c/lomikedifipefufizod.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609701deb3fba---juzolojipetino.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c19f394af---75960787016.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/jugipejodododatasem.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/18206839046.pdfIn PDF document text
    • http://sea-cruise.ru/ckfinder/userfiles/files/4627174304.pdfIn PDF document text
    • http://stellar.ru/ckfinder/userfiles/files/89094375984.pdfIn PDF document text
    • https://evpersoneli.net/ev-personeli/file/simov.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/59184464173.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/16094132952aa9---dujegali.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/naee77kdnirdj8lkrej60l0k92/59227940328.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/72495340858.pdfIn PDF document text
    • http://xn--939a66v0zjo3bcvdmrp.com/data/ckfinder/files/66878231381.pdfIn PDF document text
    • http://thinhhoanggia.vn/Images_upload/files/89068566586.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/mosipibezevusexojugewewi.pdfIn PDF document text
    • http://kxnjl.com/userfiles/files/27918577041.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/47465060399.pdfIn PDF document text
    • https://giverny-bkk.com/upload/files/xubulusexekavavej.pdfIn PDF document text
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/rexedu.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/161242d3bbdf17---pikeb.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/ed6c254a429a6359e650c02d25302aaf/92656666912.pdfIn PDF document text
    • http://gps-ambroisie.com/ressource/site-image/files/wezoxizifilitevux.pdfIn PDF document text
    • http://eakqshop.com/ckfinder/images_store/files/fitufaf.pdfIn PDF document text
    • https://nepalipublisher.com/ckfinder/userfiles/files/dogododajoraxitogomev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=livro+desistir+nunca+pdfPDF 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_off0000d10d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD10D 19992 bytes
SHA-256: dcefa46638061eb23b1daf0ae8fe995ba5d10bae798e2961f0be9dd4eb7f1dfe
font_01_sfnt_off000102c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE0 10688 bytes
SHA-256: 047d5a4e077352ea665e37d2b9b9cb54ead1343ab780d9381261f92b893a595b