Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2e549c92387b189…

MALICIOUS

PDF

42.9 KB Created: 2021-09-04 00:22:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9ca84cde1c21ee18581ebb228940efa1 SHA-1: a5746aac4432c784b3f2c56a8601abcdcdc1dc02 SHA-256: c2e549c92387b18904835a291b9d16787033bc30523171ae9a6ce398e2b241e1
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier. It functions as a lure, presenting an image-based interface to conceal clickable links. The document contains numerous external URIs, many pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content or phishing pages. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7814

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 42 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://smidgel.ru/uplcv?utm_term=delonghi+air+conditioner+nf90+manual PDF link annotation
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16097dd3010512---86775281401.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c14423af53a.pdfIn PDF document text
    • http://korvet-sp.ru/userfiles/file/4238833596.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3a2bced95---96829286404.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ca57e85d32873ad3974c8e81202e8870/6967695876.pdfIn PDF document text
    • https://gelblighting.com/userfiles/files/budulurosujedokuxupotu.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160842bb206644---72627739937.pdfIn PDF document text
    • http://fsgzb.com/upfolder/e/files/20210803141511.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/3a27f8cc261454eaa93e37f2a41fd154/98927437795.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/caa2daef919125a8b9374cc1c4989770/bexidipizubatufugojoma.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160804b8f8130c---51568260618.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bee69afb7d---gojalelo.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/dadulazunu.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16075bc8f44b93---lireluvaxadaxavuwalosizid.pdfIn PDF document text
    • http://burmeseburmilla-allevamento.com/userfiles/files/janosizimofufadilimarisax.pdfIn PDF document text
    • https://verredistri.fr/xmedia/file/92230971842.pdfIn PDF document text
    • http://www.themixchange.com/userfiles/files/jimewutibo.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/f320cca758f143a464299232e203f4bc/67933732881.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160adcd5cbd1f0---wipufasot.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/32483157348.pdfIn PDF document text
    • http://yizhu580.com/ckfinder/userfiles/files/nejozavezibofaki.pdfIn PDF document text
    • http://sunjewelsonline.com/userfiles/file/61017451205.pdfIn PDF document text

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