Malicious PDF — malware analysis report

Static analysis result for SHA-256 57e5ff61d4c2d3c5…

MALICIOUS

PDF

85.8 KB Created: 2021-09-16 09:46:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 3cfcc796d37e5b6f0e031d0daa5e44f4 SHA-1: daa07f92e5b5fb7f8e7bdcfe92fa33949deb75c5 SHA-256: 57e5ff61d4c2d3c5a8c77a1591306872dec4c076bef60bc9cf3f70192355c034
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm, directing users to multiple external URLs. Several heuristics indicate the PDF contains links to potentially compromised websites or disposable hosting, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4151

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/welikiribogoviworak.pdf In PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161413c6df2ee6---29406177631.pdfIn PDF document text
    • https://biorenta.lt/ckfinder/userfiles/files/ragavagegojevuz.pdfIn PDF document text
    • https://webmedcentralplus.com/userfiles/file/12582547211.pdfIn PDF document text
    • http://verduciautodemolizioni.it/userfiles/file/82118260680.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/e30715d36fb224f8ed69576ccaff6761/navububafopipiwirut.pdfIn PDF document text
    • https://universitecentrale.net/uploads/FCK_files/file/67747682328.pdfIn PDF document text
    • https://healthlantern.com/ckeditor/ckfinder/userfiles/files/mabusagusoropawit.pdfIn PDF document text
    • http://maximaviajes.com/FCKfiles/file/bepabo.pdfIn PDF document text
    • http://nomayaku.com/userfiles/file/janewavukifu.pdfIn PDF document text
    • http://hydrem.ru/images/file/71714335552.pdfIn PDF document text
    • http://topenglish.sk/app/webroot/gallery/files/8500389969.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/if542vhj8ur628bcgkrcjnrjc2/vumofezuxumewib.pdfIn PDF document text
    • http://gcoekmr.org/cukashmir/User_Files/imagefile/13417501973.pdfIn PDF document text
    • http://ginzaramen.us/uploads/files/zotaxeduzope.pdfIn PDF document text
    • https://estduquebec.com/scripts/php/xenocode/lib/ckfinder/userfiles/files/jukodozukiko.pdfIn PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/monejulel.pdfIn PDF document text
    • http://letnipohar.cz/upload/file/fujuvu.pdfIn PDF document text
    • https://ispartaorganizasyon.com/ckfinder/upload/files/kobapadapaba.pdfIn PDF document text
    • http://dija.lv/public/userfiles/file/dowazalirakarajarafew.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/2c12d4ab1509fb9de59724c96d9747c8/gararuzivuzomanonaziki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=how+can+you+tell+if+your+phone+is+rootedPDF 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_off0000f7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010fec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FEC 11008 bytes
SHA-256: e916703e18c2951a197c9da8bfdc37240ce00454421e52e58af249777641cd01
font_02_sfnt_off00012978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12978 17228 bytes
SHA-256: 8d65cab8f26aee37eeab47ba165704fa8cc096ec3e67716ab17d787d7f9dd629

Open this report in the interactive analyzer, or submit your own file for analysis.