Malicious PDF — malware analysis report

Static analysis result for SHA-256 177408eedff8c20f…

MALICIOUS

PDF

56.0 KB Created: 2021-07-03 23:31:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7a4fa1fbfdead45433fceff4c5087518 SHA-1: de79818f70a95df0af1701d7f39a74d55ced6112 SHA-256: 177408eedff8c20f0e9a0059c329be7ec3d756313b433df8569c9f58490f6031
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm used for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6383

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.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b852339973---lolozasirovotizamizazo.pdf In PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/ba3f6a0d4009a8d99dcd9a88d3899789/fajojuto.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160847d63c257d---gurisepururaledavanib.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc312d4679---tebinadazewu.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/29p0u5n3q6umntocudfjcd5fqv/71455800027.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5ea605097---bifatebawapel.pdfIn PDF document text
    • http://meta-min.com/files/9540560059.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/85ab1e3219f123ec45489261539c115c/rirusixab.pdfIn PDF document text
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/13517484223.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/37cd524a90712bf731fd5cd16599e728/zusudunazasezelutazovuwog.pdfIn PDF document text
    • https://12waktu.com/contents//files/pexapos.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/0ac05385d2d994b08dbb2e9c72b555b1/218530574.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b417a45f58b---guwugoxufomed.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/ae142bbc92cba73e6e30aaf2e7d3492b/25597891418.pdfIn PDF document text
    • http://unesco-mediain.cz/fckfiles/file/tibusufaleduvesanote.pdfIn PDF document text
    • https://t2sc.me/userfiles/88614383574.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a722a35bfad---75811219069.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/e335469773c100055d6b3245a6a00a80/gekabafabogiwi.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c49f645a937---8381226090.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b40077605c6---vamukife.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=laser+treatment+for+fissure+side+effectsPDF link annotation

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