Malicious PDF — malware analysis report

Static analysis result for SHA-256 c943d0acbbec649e…

MALICIOUS

PDF

62.6 KB Created: 2021-07-23 15:51:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6177f5df83d5c4b6d6826d83dc345f18 SHA-1: 66f9bfd0bddb2ed187a4ab2e0a19009c39f7a4b3 SHA-256: c943d0acbbec649eb7b845fba7f27b646d6572729b97e09f0437d34ffe707c96
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics strongly suggest an attempt to redirect users to external, potentially harmful, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9688

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 http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606d918566687---9497077332.pdf In PDF document text
    • http://rafaelokazakov.com/file/mixiwurotatefonemafe.pdfIn PDF document text
    • http://esebtekstil.com/resimler/files/15122309101.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/0vh6kr16j6i6rhhl5kgbvk2iq1/7437779163.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/kf1q6gt6tml83lfic06l1gcu1p/wodemip.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/dewij.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/t1e3urg90oap3misth0ilho2o1/2388227896.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609708f489ce3---79316214831.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1607722e7dec4c---38055383214.pdfIn PDF document text
    • https://novamakine.com/upload/ckfinder/files/soras.pdfIn PDF document text
    • http://kpdb.org/userfiles/files/gewuwafo.pdfIn PDF document text
    • https://cochleartudaskozpont.hu/files/71089030751.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/oj5i5he0qm8mpp5vfsrqo9sokl/fojobejelowixiraxirofax.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/ad65927320ee47b8d4746d55a1672e9a/wunikojobesagiwon.pdfIn PDF document text
    • http://www.parinet.fi/tiedostot/files/18987683116.pdfIn PDF document text
    • http://projecthouse.bg/uploads/CKfinder/files/7709976730.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/u982fhoau5mv9i9t9mq4kta5p6/82247507503.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609dfc2a40aa2---lazexefi.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608eef1ab3675---39301517826.pdfIn PDF document text
    • http://uni-farm.pl/ckfinder/userfiles/files/90781240345.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/3e75238fcc1361923338ffc9b899d0af/supewivevunutafolixipu.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/568a05d98ce15f5cc62c5c6f0af30ef4/27761137170.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a9b9f260b---jogekiwilulupuritid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+write+a+summary+of+a+personPDF link annotation