Malicious PDF — malware analysis report

Static analysis result for SHA-256 4873034bcb754ac6…

MALICIOUS

PDF

85.5 KB Created: 2021-08-12 10:27:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 20d86ef9f15966b71c5eec23d647a015 SHA-1: ab4207845bf7e6fdf58530223161b9d300006dd9 SHA-256: 4873034bcb754ac64ce62e4cf0adc64c9097a57e2d35036ec9a71deefee3f011
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document exhibits characteristics of a phishing or malicious content delivery mechanism. It functions as a link farm, directing users to various external URLs, some of which are hosted on compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6146

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 http://aksaaydinlatma.com/img/editor/image/file/sojidegu.pdf In PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/27714943a15f758b1fada4f3c63ef23a/10260470851.pdfIn PDF document text
    • http://cosyromania.com/media/file/47363346542.pdfIn PDF document text
    • http://healingtown.org/userData/board/file/kimejosan.pdfIn PDF document text
    • http://mousike.it/img_ins/files/92705374741.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/20bu3jddbmb53so7f4gur31m4h/xutokozobafaserobixidu.pdfIn PDF document text
    • http://wksystems.net/HotelEstimator/userfiles/file/15506222619.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/b145a1668a504b4fefef335ca2b9087c/vemuwufofogima.pdfIn PDF document text
    • http://sun-green.be/ckfinder/userfiles/files/74903036715.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a6390823284---17922723312.pdfIn PDF document text
    • http://berbun.com/user_img/file/31985496969.pdfIn PDF document text
    • https://diarch.in/WYSIWYGImage/file/ributuvumomenuporudabivew.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/zajerireneduwunoluj.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083e11c06dfa---33428460367.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/82329378248.pdfIn PDF document text
    • http://archimax.ch/dynamic-images/cms/file/94339636996.pdfIn PDF document text
    • http://haenuri.net/ckupload/files/mepaxebaxuvelero.pdfIn PDF document text
    • https://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/7125c69ee35733f6092369ecda864655/17046281456.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2aab37c785---93221444554.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb09f281d8---japezozuvowanojixif.pdfIn PDF document text
    • http://lblussana.it/images/file/74962279617.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f5940aaf8---83879511932.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/pefomugeditiwe.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1062ced37---gukoroxojuxajuded.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/37712840186.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/33632019373.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/ronibug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=in+broad+daylight+movie+tv+onePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001232e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1232E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1