Malicious PDF — malware analysis report

Static analysis result for SHA-256 84d092858e61f3c7…

MALICIOUS

PDF

88.1 KB Created: 2021-07-22 11:42:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 274ed3aaf05f2eebc39b3fecd842f5d2 SHA-1: c8694362287731fbf09120ae099e2688469d5749 SHA-256: 84d092858e61f3c7ac4f5135ce84813dfc7ed6ff7a8d4ad52b8a91a67c0d16c0
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or conduct phishing. The embedded URLs are designed to redirect users to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/tkkf6kq36k8isis90cvt73rgq4/20515827564.pdf In PDF document text
    • http://progfin.pl/userfiles/file/dafapejatuvanovigerezaw.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae14c0430a---filukiwevuveg.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/0de965f9841294292fe3cec5b440355e/27731998827.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/sakuwanoxopezikukuj.pdfIn PDF document text
    • http://samtekelektrik.com/files/99909682910.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/kk3m3e6mgo2l0novpt8arhe4l7/lonezalanebib.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c318d51742f---gajuzovudavifatu.pdfIn PDF document text
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/0def31814d4bbbbc6070e589efa93ac8/kitepuzudezekatepegokew.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/2ord4n5ukhl9rloiissg0fi4oe/pamudogana.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/2290915056.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/p1ed5vf3u9m1cuqkc9affah1g6/74144789800.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/89tas1ftjam5e2kmduttpof7rp/12421053697.pdfIn PDF document text
    • http://tipsclubcr.com/campannas/file/32902779159.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/789632332f5a792ce4fef4bcea02c52a/janiv.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/bafed6daa12bc6dcce7ebd507706be52/gulusenikuz.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/jslsnj9icqie9cnd1mrsvprm57/39190183133.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/e33b66e301a6b3203567cc3ce06ca3e7/pusiwizaxepap.pdfIn PDF document text
    • http://hbleg.com/admin/userfiles/files/27691332733.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b8dee53465e---74196328437.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/6ba9d547958bf45114fb055e2efd4c4b/74063410800.pdfIn PDF document text
    • http://isagenixmakessense.com/ckfinder/userfiles/files/15211153793.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=how+to+recover+inbox+in+outlookPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EE 10468 bytes
SHA-256: e1f6464d3b6ac2651535c402bd1aefb32a378bf3080c3d2cbced44bd7f4c241a
font_01_sfnt_off00010dcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCC 17132 bytes
SHA-256: 798368a24de6f69d4db6684afe4707fda48657ab8cc6d139300d04429d5220e9
font_02_sfnt_off00013a4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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