Malicious PDF — malware analysis report

Static analysis result for SHA-256 44e13f765629a1bc…

MALICIOUS

PDF

55.8 KB Created: 2021-09-24 05:25:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 31848d174fa28b70676673d63f5481f8 SHA-1: b6c813638e8b42cf0e811fd50099074ca1726953 SHA-256: 44e13f765629a1bc997d49d2110f83641d462fc7c89c844922f7c32a2527f27d
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as a phishing trojan. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to external sites. Several of these URLs are hosted on compromised CMS platforms, indicating a potential distribution or hosting mechanism for malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2767

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://windfreeklima.com/upload/ckfinder/files/jutumobidikomijuwurimu.pdf In PDF document text
    • https://numen-wow.com/userfiles/cloud/files/rajosofiwigudipivolidi.pdfIn PDF document text
    • http://www.ags-sib.ru/ckfinder/userfiles/files/redoduvujaguzozagodogigo.pdfIn PDF document text
    • http://standartbio.com/fckfiles/file/2261159148.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16130a014ce270---delosikisugijisukub.pdfIn PDF document text
    • http://sushimura1.com/uploads/files/sulediwanefegunawatini.pdfIn PDF document text
    • http://grupafurman.pl/!mag2011/userfiles/file/gumawitarodigika.pdfIn PDF document text
    • https://speakingparrot.com/upload/ckfinder/files/12850919691.pdfIn PDF document text
    • http://jplus-ag.com/upload/files/BodyFile__614525914E087.pdfIn PDF document text
    • http://ongxoanhdpe.vn/upload/files/93343147861.pdfIn PDF document text
    • http://bacvietexpress.com/upload/userfiles/files/17316836555.pdfIn PDF document text
    • https://vnmmalta.com/userfiles/file/jelunututepaju.pdfIn PDF document text
    • https://mtmhomeschool4art.com/mycms/uploadedimages/editorUploadedImages/file/maduregisivixobesisutale.pdfIn PDF document text
    • http://weiddy.com/uploads/files/202109201552101966.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/texugowagawubatejudewu.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/8pg709hgbmt8e3ot8osci3gihi/nofitukoxifilaboz.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/9d067dabdc0b85f2ab14191a899d44b0/74953632098.pdfIn PDF document text
    • http://www.civilhospitalpalampur.in/img/uploads/files/lufagupenikimaduviwit.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16137ab523d887---foxerinuvavibejipinugoj.pdfIn PDF document text
    • http://paykaaluminiya.ru/ckfinder/userfiles/files/wimusunakenezofinal.pdfIn PDF document text
    • http://acudrved.com/ckfinder/userfiles/files/koromanusevejojusoke.pdfIn PDF document text
    • https://farmacieitaliane.com/documenti/file/40627338087.pdfIn PDF document text
    • http://villacappuccina.com/userfiles/files/70441389738.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147d9d6e290d---13450164042.pdfIn PDF document text
    • http://geteffective.biz/uploadfiles/file/boreki.pdfIn PDF document text
    • https://festival-bg.com/media/ckuploads/files/82210517139.pdfIn PDF document text
    • http://cecev.com/stockages/files/vetiwav.pdfIn PDF document text
    • https://snapstudios.ca/userfiles/file/kotaxeremumiravaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=practical+english+usage+by+michael+swan+4th+edition+pdf+free+downloadPDF link annotation

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