Malicious PDF — malware analysis report

Static analysis result for SHA-256 acc1cbb5316747cd…

MALICIOUS

PDF

79.0 KB Created: 2021-08-12 19:05:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 77290bee81e5d2c3e31562fade12fff3 SHA-1: a11215c8d9107208838117b0597bc70607b2657b SHA-256: acc1cbb5316747cd9c527db2facd34b0b515ee1df158584f8ec0f40ca3bc7e80
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery through these links. The presence of multiple distinct hosts and a high number of links per host further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8548

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://ketchas.ru/uplcv?utm_term=formula+para+calcular+el+punto+de+equilibrio+financiero PDF link annotation
    • http://partner-support.net/user_data/userfiles/files/10842462877.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/bh6d0b601tdojgdtt5qauogt0d/55593075288.pdfIn PDF document text
    • http://ototavandosemesi.com/resimler/file/biripifoluzezovewo.pdfIn PDF document text
    • http://slbreakingnews.com/ckfinder/userfiles/files/28743762641.pdfIn PDF document text
    • https://unosms.us/userfiles/file/guvemiwawotuwelejavatuk.pdfIn PDF document text
    • http://ecogestval.com/userfiles/file/simovozuruxunogivepobew.pdfIn PDF document text
    • http://homelife-superstars.com/image/files/41866581547.pdfIn PDF document text
    • http://www.asap-recruitment.net/upload/file/wifez.pdfIn PDF document text
    • http://preciz.com/uploads/wysiwyg/files/lewetofatelurinapewuwe.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/982d78c267c6bd4f61b9d2e72d46322e/97586795208.pdfIn PDF document text
    • http://ride.hu/images/uploads/files/75086179739.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7acdf347ce9164faa9253d9a3bc9d03f/xinetuzobe.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e77a18e79---47104291498.pdfIn PDF document text
    • http://casaperferiesantamariagoretti.com/writable/public/userfiles/file/daxewuz.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160855bf46979e---27845483756.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/f0c2b55a0549c9133aa61a30adc41ffc/kakejolomebuw.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/senux.pdfIn PDF document text
    • http://gamjagolla.com/uploads/files/dakuvup.pdfIn PDF document text
    • http://opuspointpartner.com/ckfinder/userfiles/files/86915071213.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d74cf0a8739---wepiv.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/57122a9022392fad5c56dc1e1dd0a1e9/ramitezumipisimufavoz.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/8d8b4180974c704a0eda36749f06979f/tezefupu.pdfIn PDF document text
    • http://bangdientunhk.com/upload/files/jopuduwusofozedusob.pdfIn PDF document text

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