Malicious PDF — malware analysis report

Static analysis result for SHA-256 a20da92866aa5b41…

MALICIOUS

PDF

64.0 KB Created: 2021-09-07 13:55:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: baee49b3a52f4d6fa0658aa50c1819bb SHA-1: 5909243a31e62abe5df64459ecf0487cad7f5490 SHA-256: a20da92866aa5b414c8569846a32154edea591ebba04ca2b9f9c595634742b18
154 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating it's a phishing trojan. It functions as a link farm, directing users to multiple compromised WordPress sites that host further malicious PDF files. The presence of numerous links on disposable hosting and compromised CMS uploads suggests an attempt to distribute malware through a deceptive lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6379

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://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3de10c20a1---47126648667.pdf In PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bebeecec1c7---98590154002.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/907fa4890ee6376dbcd8b69ab9c0024c/48085481259.pdfIn PDF document text
    • http://hphs1958reunion.com/clients/47465/File/dutejumizu.pdfIn PDF document text
    • http://classicalgardenstatues.com/uplds/file/50928030959.pdfIn PDF document text
    • https://totalmediasolutions.ae/ckfinder/userfiles/files/kupizekolilaxaxa.pdfIn PDF document text
    • http://sl1971.com/clients/5/51/517263f0417f9379c67e6eba0e0bdfe8/File/wamusarane.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e959047f474---12225956502.pdfIn PDF document text
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/9natlfi5skj0vr9smuk6u1v3gl/28512212732.pdfIn PDF document text
    • http://jordanfamilyreunions.com/clients/5/51/51534e3e38036466a76ca8a024fd4923/File/nuzejexataxowepogepizon.pdfIn PDF document text
    • http://marinda.ru/pics/images/file/zigikoj.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa69d507ed---13792487159.pdfIn PDF document text
    • https://erdemlerkoleji.com/resimler/files/48164479644.pdfIn PDF document text
    • https://briljant-maleri.se/UserFiles/files/20514462330.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/b026c47e5a44c2edcd1dbaf9d417ee7b/85268764887.pdfIn PDF document text
    • http://ayhancevik.com/images_upload/files/39185562569.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160f35cc822399---fifexedaj.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/58818602174.pdfIn PDF document text
    • http://hpmcfamilyreunion1968.com/clients/83891/File/81008254570.pdfIn PDF document text
    • http://compow.net/ckfinder/userfiles/files/72812512646.pdfIn PDF document text
    • http://kartywspomnien.pl/uploads/assets/file/28576376971.pdfIn PDF document text
    • http://educasters.co/ckfinder/userfiles/files/lemunivokuvekefalaripapuv.pdfIn PDF document text
    • https://computerzone.pk/file/18869380574.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/xugelusorovuxator.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=schindler%27s+list+pdf+pianoPDF link annotation

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