Malicious PDF — malware analysis report

Static analysis result for SHA-256 9330a9acbe39f6a6…

MALICIOUS

PDF

53.9 KB Created: 2021-09-01 19:25:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 86e165b824ae4dc48a1b492b5641d169 SHA-1: 1375c3fe0f16e1850bb37f904c1284faf03cf0b4 SHA-256: 9330a9acbe39f6a66aaf6f6a1679dcbabe2e1b185460f8c921e5dfb1e13b526b
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and disposable hosting. These links likely serve to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8108

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://archism.ru/uplcv?utm_term=how+to+add+double+line+border+in+excel PDF link annotation
    • https://stiff.pl/ckfinder/userfiles/files/74205534707.pdfIn PDF document text
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/pebefazodadoruxedar.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/e02b9a898bf5c465202c494ee242ca62/74925997788.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/3bqguaess0iugeagid87d48s6g/zisitopet.pdfIn PDF document text
    • http://irinka.org/ckfinder/userfiles/files/53900522166.pdfIn PDF document text
    • http://vinhthuan.vn/upload/files/5169082790.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609874212b744---53871820973.pdfIn PDF document text
    • http://24cvety.ru/upload/files/88181336089.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/8grnj50tqg4538lq303b7u9r41/xomazo.pdfIn PDF document text
    • http://actybrain-consult.com/Upload/files/xixuxenigonerilud.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/d45ea0974512d67b7d02984ad3dfed22/61503752984.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/bda1ae1f7802bf9b43a57bbb28e8dac7/bozozuzagejezulir.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091618e0b7bd---farowos.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160886ab1b864c---25308833391.pdfIn PDF document text
    • https://congchung7.com/upload/file/42323687014.pdfIn PDF document text
    • https://psg66.ru/admin/ckfinder/userfiles/files/diwudano.pdfIn PDF document text
    • http://ex2010.com/uploadfile/file/2021081821181173499.pdfIn PDF document text
    • https://fokusmedia.com/images/uploads/64655756016.pdfIn PDF document text
    • http://vejwun.cz/images/foliveku.pdfIn PDF document text
    • http://ikra-ekb.ru/files/fckeditor/file/93226669120.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0d34ef0ea---vimudiriwowotarusijakaxov.pdfIn PDF document text
    • http://viettelhaiphong.me/data/dulieu/files/44839916109.pdfIn PDF document text
    • https://cafesca.org/ckfinder/userfiles/files/43429215924.pdfIn PDF document text
    • https://ontech.vn/images/ckeditor/files/16788414569.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/fIn PDF document text

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