Malicious PDF — malware analysis report

Static analysis result for SHA-256 a75d66009edc5866…

MALICIOUS

PDF

153.0 KB Created: 2021-08-12 18:58:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5aed32afa40631bd555aa4fd5f38d5e5 SHA-1: 9d0997ef9862190a92e0995dce6b417445d11e5f SHA-256: a75d66009edc5866dce86f58ebe6efb736f0c5f478356d6fb6f94cad697ebc83
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9529

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://catamma.ru/uplcv?utm_term=lesson+3.1+practice+a+geometry+answers+pages+107-113 PDF link annotation
    • https://cheesykeju.com/contents//files/41432501759.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160881ce4302f3---siwugurema.pdfIn PDF document text
    • https://miguktour.com/FileData/ckfinder/files/20210625_8B012092D06D4FE0.pdfIn PDF document text
    • http://centromp.it/userfiles/files/33253997115.pdfIn PDF document text
    • https://10playsolutions.com/clients/softklk/documents/_articles_/file/liser.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160868e4399e42---56349563764.pdfIn PDF document text
    • http://zoo-foto.cz/userfiles/file/tirafinewabajosubewon.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/25gulg7tallgav1vevha9clp5s/goxibemuj.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093daa348b8d---20011161149.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1621452167.pdfIn PDF document text
    • http://vertracapital.com/uploads/files/49989646424.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/bigifipukezafa.pdfIn PDF document text
    • http://ketoanaca.com/uploads/image/files/32532022122.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/5a40e1bd29ad04a48a9d124b3a0e254e/15803490247.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c03f4dc0b52---65535624786.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a98432a20d1---letokajatedu.pdfIn PDF document text
    • http://builderall.info/userfiles/file/gosekosodejejopexomibone.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4000bf1e2a---72847801956.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1ebcf3d10---lifibitosisunoribopipobe.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b01a92dd10---34865861383.pdfIn PDF document text
    • http://fritz-fahrlaender.ch/download/83645966438.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160751f85dd23a---pobedomiwepagigafivin.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/e94c9e02046abd6055733eba665a24ee/lirejukagapej.pdfIn PDF document text
    • https://mediaget.com/userfiles/files/fenukolowuruvumekek.pdfIn PDF document text

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