Malicious PDF — malware analysis report

Static analysis result for SHA-256 adf528c1acc974a2…

MALICIOUS

PDF

57.5 KB Created: 2021-09-02 01:05:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5f997b5f74dc782671a45fe48f3de3a4 SHA-1: 8a123b5122e8867be4f983f9845ad71da3f1b232 SHA-256: adf528c1acc974a26584c8151f66ce7ef9375715aabfcfdbf7fd85e880235f4c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress sites, suggesting it functions as a link farm to distribute further malicious content or phish for credentials. The presence of external URIs and a link farm structure points towards an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9142

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 https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1606e6b227b0f8---63473654310.pdf In PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/2769585fbb6772a7c1ff9bd7e2da7c01/xitowufitisomaravifeb.pdfIn PDF document text
    • https://ntiverification.com/userfiles/file/gutilefubodowowavezex.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/bd7f86e939628807ef19ba621567abaa/katafufe.pdfIn PDF document text
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/59115814823.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/39081577227.pdfIn PDF document text
    • http://trungtinjsc.vn/upload/FCK/file/borinewata.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/166ca7da928a7eb09ce2871b9974b802/85139470909.pdfIn PDF document text
    • http://seattlebestteriyaki.com/uploads/files/rijurusorenazonuziler.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/t4fi2hnsvqqsr4njg1cjj1e8q4/20898778731.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/76953104887.pdfIn PDF document text
    • http://bigdoughpizza.com/uploads/files/85193563948.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/naxesobixe.pdfIn PDF document text
    • http://tuning-zone.eu/userfiles/file/dagumisudewasowosez.pdfIn PDF document text
    • https://fwullong.com/upfiles/editor/files/11066036349.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/bc091cb74f27fa084c66c07759a2cd87/40444053733.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9b8dd85c6---65486781125.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/4d2fe0679e12c4107e8b9d42427e91ed/sareferuv.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/95461650575.pdfIn PDF document text
    • http://dermalab.pl/userfiles/file/vaguvixurodoluk.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a704056a80---83650624542.pdfIn PDF document text
    • http://maxtarget.by/ckfinder/userfiles/files/basib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=c%23+an+object+reference+is+requiredPDF link annotation

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