Malicious PDF — malware analysis report

Static analysis result for SHA-256 db0ea483d892c2f7…

MALICIOUS

PDF

70.3 KB Created: 2021-05-07 08:00:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 116a935950e557ae8fdd66c3ef67feb1 SHA-1: 2f12fa7174b130f51de4715a161a43602c9028b3 SHA-256: db0ea483d892c2f77641c0f505d17d239cd2d310057ea3cd54ebc484c8d924f3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application T1059.007 JavaScript

The sample is a PDF file detected as malicious by ClamAV and an ML classifier. It contains numerous links to compromised WordPress sites, specifically pointing to PDF files hosted within the 'super-forms' plugin's upload directory. This indicates a pattern of using compromised infrastructure to host malicious documents, likely for phishing or malware distribution. No scripts were extracted, but the presence of multiple external links suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9604

Heuristics 6

  • 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
  • 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 https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/k057levouve0paqm8epuevlse3/36926782014.pdf In PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/647d65f1376ea99498ae707c7f5e91a2/33934018743.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/zuwowa.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/45a29c3ac4fdee17165186658d4d0a9a/dowodabunidakag.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/91198d195f2105e384543b9fbd1a9f29/37850489423.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/3mu0tq6b21le9gvq57rgk4f1dq/nozegovarurelun.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608470d9e26f9---femeduded.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef81fd16f8---koserowekizifu.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/0a31b5912678b5dcfd5d4c40980dbb30/ropozazibo.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/4178b17b335e14f93c703c109b8c30eb/tumovejejejux.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd48dcde30---fonoge.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16094209837b28---86507466023.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/l81ug691lhqb8co6t0lvu3ias3/sojolefuganexelitim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=analyzing+literature+the+formalist+perspectivePDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CE 5628 bytes
SHA-256: 9095818d6197c2fafa62d57578a562dd9e146c45f5e8e6d04c4a9d3701939922
font_01_sfnt_off0000f5ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EE 10480 bytes
SHA-256: 11e42416b84d08758f249814d76a83f9b4ae048f15dae15cf4557cd66b20b415

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