Malicious PDF — malware analysis report

Static analysis result for SHA-256 16aca99aedbca028…

MALICIOUS

PDF

55.4 KB Created: 2021-09-07 00:19:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9626a23b8ad2fadde94cac5c8ac406da SHA-1: 1b2818598d4eb117898fb2fd7ec5eba360be2d5a SHA-256: 16aca99aedbca02862c2dd625a6db6fa597f42ef9d9d8d571083af7d0cc58831
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which point to compromised WordPress sites. This suggests a phishing or malicious redirection campaign. The ClamAV detection and ML classifier further support its malicious nature, likely serving as a lure to exploit kits or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5046

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 https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/n0j74klqdd24rslqv3019ccgr1/97023097054.pdf In PDF document text
    • http://songpinhao.com/userfiles/files/50403403635.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/37rs8ml7c1h0ei8dfceuemvt0v/26439639389.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/furejexot.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608cfdb4e0a14---48831888609.pdfIn PDF document text
    • http://wangyiphk.com/userfiles/9699634499.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/e44c729e98a34ce30dee036b1b4a647b/kapiwijedisavaron.pdfIn PDF document text
    • http://flomojapan.com/upload/files/sopuxaxume.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c26099454d8---simaba.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16078860b760e2---82261344268.pdfIn PDF document text
    • http://agroanaliz.by/upload/editor/files/69745809470.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ceb9858629d---19691994413.pdfIn PDF document text
    • http://svaz-podnikani.cz/files/file/59499689558.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606caa127a0e2---61507269415.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160865dbf24d93---xosus.pdfIn PDF document text
    • https://thaiwoodengames.com/files/upload/files/zixuzevedigigemavomana.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/851047a0d29c9fa708f2c1d45e5991cc/xafokiboma.pdfIn PDF document text
    • http://myphamso1.net/uploads/files/buwupopalinegel.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1611d6a256e81a---rufafarukatinopuvogaxosa.pdfIn PDF document text
    • http://law885995.com/upload/fckimages/file/64702570491.pdfIn PDF document text
    • http://oticonshop.net/ckfinder/userfiles/files/81159554880.pdfIn PDF document text
    • http://onlineticketreview.com/images/file/68621715201.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/16091d2a39f641---jomusu.pdfIn PDF document text
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/zimewupubarivomepuwuweg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=list+of+irregular+verbs+in+english+with+spanish+translation+pdfPDF link annotation

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