Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff3262223e7e6612…

MALICIOUS

PDF

52.6 KB Created: 2021-09-09 19:36:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7e2014392ccd4b764925bedea50fc8cc SHA-1: d68d32b39abe2330847c1706cb58ad232aaa2685 SHA-256: ff3262223e7e6612cdf098ea080ceb5be0aa4ccc27d2931422c5ad88786ae7b9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or link farms, indicating a phishing or malicious redirection attempt. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it is designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7946

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://andrejc.si/files/file/debetoget.pdf In PDF document text
    • https://livre-d-art.com/ckfinder/userfiles/files/89592211942.pdfIn PDF document text
    • http://computerdoki.hu/user/file/48409160148.pdfIn PDF document text
    • https://cplastik.eu/data/cms/file/moduxokuv.pdfIn PDF document text
    • http://kientrucphatloc.com/upload/files/turetanapasuwip.pdfIn PDF document text
    • http://hkxhjfc.ltd/uploads/files/20210906193448.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133434141d63---6915641918.pdfIn PDF document text
    • https://shevian.com/images/file/rezogaxetizowojokediv.pdfIn PDF document text
    • http://www.bash.cl/media/file/tevudizujifedepet.pdfIn PDF document text
    • https://yuanfuconstruction.com/ckfinder/upload/files/70519591529.pdfIn PDF document text
    • http://vigova.com/Images_upload/files/89372363404.pdfIn PDF document text
    • https://igk-lilienthal.de/downloads/jimujutifomuruduxo.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/3kbjgv1h9s5ta38ds2ieo78foo/nilakeraxitogewe.pdfIn PDF document text
    • https://workinhotel.com/upload/fckfile/vivebekofolakekuwijik.pdfIn PDF document text
    • http://baruraprotidin.com/assets/ckfinder/core/connector/php/uploads/files/wenabitinotodasopokul.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/58064142415.pdfIn PDF document text
    • http://plaschke-partner.com/uploaded/file/luziresexim.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/8sb4n6fsro1rl2g0blgskfpkj3/bepijidivosiro.pdfIn PDF document text
    • http://www.ih-consultant.com/ckfinder/userfiles/files/zizeben.pdfIn PDF document text
    • http://greddy.com/admin/common/ckfinder/userfiles/File/14745994376.pdfIn PDF document text
    • http://xn--o39a91gvwm83kbsn.net/FileData/ckfinder/files/20210907_8367025E3A926160.pdfIn PDF document text
    • http://wo-kop.pl/userfiles/file/wojovoguzidagese.pdfIn PDF document text
    • http://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/3254763233.pdfIn PDF document text
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/tixepabada.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16132bed7e970e---buzuri.pdfIn PDF document text
    • http://tongrentangthai.com/UserFiles/file/4637479545.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=home+design+word+life+mod+apkPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB643 10912 bytes
SHA-256: 48c92ee91229357b794dcbc8c9d59272b80fa30f52f30f3c8278544f0f3677dc

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