Malicious PDF — malware analysis report

Static analysis result for SHA-256 2514f793a0050233…

MALICIOUS

PDF

43.6 KB Created: 2021-09-30 17:03:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 65e3e5e3a1052643390f5b1bd9c3813d SHA-1: 39ac71027ca7d4da43cb0be7767485032db7dec6 SHA-256: 2514f793a0050233fc806830d559244590656f372606786eff13b98a3c4396ff
154 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The primary attack pattern observed is the use of a PDF document to host a collection of links, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7222

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://wastran.ru/uplcv?utm_term=hidden+side+app+android PDF link annotation
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ecb37884ed---binarabivelonipebir.pdfIn PDF document text
    • http://offerseir.com/basefile/offerseircom/files/kilexirasumibo.pdfIn PDF document text
    • http://hotelniagararimini.eu/userfiles/files/rozal.pdfIn PDF document text
    • http://dinhviht.com/images/newtech/files/niluzenixizexudi.pdfIn PDF document text
    • https://fundacjaartfreeart.pl/userfiles/file/94469435286.pdfIn PDF document text
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sexijepafimarewukugutak.pdfIn PDF document text
    • https://ever-progress.dacola.com/upload/files/37238041599.pdfIn PDF document text
    • https://dijitalsanat.link/upload/files/12581443202.pdfIn PDF document text
    • http://oticonshop.net/ckfinder/userfiles/files/futudugajojonipifewareko.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/u67etlvpu3f8h9dmlcfmc97h2r/garegiwefixupiluvin.pdfIn PDF document text
    • http://sprostredkovanieuverov.sk/res/file/dedemavilitoxejadazojom.pdfIn PDF document text
    • http://noithatmyhome.com/img/files/sokusuwamijojujokirukapez.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/48105317515.pdfIn PDF document text
    • https://ecoverservice.be/gallery/file/21460953000.pdfIn PDF document text
    • http://candemdientu.com/Images_upload/files/82925320739.pdfIn PDF document text
    • http://letdentalab.com/img/files/67398815760.pdfIn PDF document text
    • http://muabannhagiare.net/images/uploads/files/89060385813.pdfIn PDF document text
    • https://gym-rectif.fr/ckfinder/userfiles/files/17077708275.pdfIn PDF document text
    • https://zenithservicos.com/userfiles/files/67213126224.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/9d47c33fa944c0eb5e2795a094513fea/zuzaxupuno.pdfIn PDF document text
    • http://ctnphrae.com/ckfinder/userfiles/files/rudarekogate.pdfIn PDF document text
    • http://slhospital.com/upload/fckeditor/file/navonomipu.pdfIn PDF document text
    • http://kantipursecurity.com/userfiles/file/7311432560.pdfIn PDF document text
    • http://image.dlib.vn/libedu/news/bachviet/20210926/file/rivelovumaxoxexiwukoze.pdfIn PDF document text
    • https://rockyhotelsgroup.com/uploaded/files/90165372358.pdfIn PDF document text

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