Malicious PDF — malware analysis report

Static analysis result for SHA-256 496d458651801997…

MALICIOUS

PDF

64.3 KB Created: 2021-08-14 00:37:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 256405fce1037f171d6fbd917b223ed2 SHA-1: c1e143786eac829cba911343f1bd32a510dbad01 SHA-256: 496d4586518019971af9b48448a5d89f61112b896ce548c59059f8931aeb15bc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised websites and disposable hosting, indicative of a link farm used for phishing or malware distribution. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were extracted, the structure and numerous external links point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9770

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 http://rydelko.pl/userfiles/file/67948006181.pdf In PDF document text
    • https://tsafar.ir/basefile/tsafarir/files/43297305891.pdfIn PDF document text
    • http://avandcie-energy.fr/ckfinder/userfiles/files/darakixijis.pdfIn PDF document text
    • http://gesundimjob.at/images/content/files/8807696962.pdfIn PDF document text
    • http://imhkayseri.com/resimler/files/46640227974.pdfIn PDF document text
    • http://veljun-ldm.hr/files/fusufajibepirofageniseru.pdfIn PDF document text
    • http://100gastro.cz/soubory/files/30157875853.pdfIn PDF document text
    • https://gikguamerica.com/userfiles/file/79982893602.pdfIn PDF document text
    • http://bvsaigonbinhduong.com/uploads/files/1037912025.pdfIn PDF document text
    • http://kuresi-kaitori.com/upload/content_pic/files/tabixegosowulapolu.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160857020cb4f4---71569127952.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a58ddc63210---90227199964.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ddb31f70d---93622749756.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608693c3f13bc---jadebinamotilegejobad.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f5cd4a1eead---48073359347.pdfIn PDF document text
    • http://agapetown.net/ckfinder/userfiles/files/54284955450.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807b85d0d07---62226863711.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160906bf9115e5---nusikirusisaf.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d905527054f---tovexeritewota.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210428222246132.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/708d2f71cf4e37d1b7915977c9ffae28/50837804655.pdfIn PDF document text
    • http://hhcreunion.com/clients/4/43/43f38dc94a4d709fe78decf5bd9d7370/File/fumavenumok.pdfIn PDF document text
    • https://etcbt.com/userfiles/file/37873906356.pdfIn PDF document text
    • http://kath-kiga-bw.de/bilder/berichte/file/70781375622.pdfIn PDF document text
    • http://oikoscoccatoarchitettura.com/userfiles/files/dugumaxegepebojojadapozus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=how+to+replace+ignition+key+cylinderPDF link annotation

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