Malicious PDF — malware analysis report

Static analysis result for SHA-256 c14c97354802f189…

MALICIOUS

PDF

75.7 KB Created: 2021-10-14 00:08:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: cbff8e77d8e30ddf153aab0c73529bc7 SHA-1: 54aa18f7ef982916047830a9b7ddd362f98efbf1 SHA-256: c14c97354802f189881cc68e195143eb0be6a1f63f647abd63bc0e8a211beeb0
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, with high confidence. Heuristics indicate it functions as a link farm, directing users to numerous distinct, potentially disposable domains. The presence of many embedded URLs, many of which point to unknown or potentially malicious sites, supports a phishing or scamming attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • 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://francescofesta.it/userfiles/files/54358101988.pdf In PDF document text
    • http://marjoleintje.nl/include/userfiles/77284844334.pdfIn PDF document text
    • http://lsbwg.com/ckfinder/userfiles/files/20210901/1131102604.pdfIn PDF document text
    • http://ctnphrae.com/ckfinder/userfiles/files/64240905022.pdfIn PDF document text
    • http://kartywspomnien.pl/uploads/assets/file/gorononi.pdfIn PDF document text
    • http://ride.hu/images/uploads/files/daganebusuruwijam.pdfIn PDF document text
    • https://arendic.cl/files/zutijojogukuvowakoka.pdfIn PDF document text
    • http://didaconcept.com/admin/fckeditor/file/tanekogikiv.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1614c323bcfee5---37229086590.pdfIn PDF document text
    • http://king-pro.com/userfiles/files/sukomidu.pdfIn PDF document text
    • http://zeamailer.zeapost.com/FCKeditor/editor/filemanager/connectors/userfiles/file/61898708534.pdfIn PDF document text
    • http://wpscrm.in/uploaded_files/userfiles/files/wotuzujuvukov.pdfIn PDF document text
    • http://konemara.hu/userfiles/file/67013482668.pdfIn PDF document text
    • http://uralcomservis.ru/crn_fls/crn_files/labemen.pdfIn PDF document text
    • http://www.madiran-cruduparadis.fr/ckfinder/userfiles/files/sotukomovotadikepuba.pdfIn PDF document text
    • http://sictombbi.fr/ckfinder/userfiles/files/soranibufimomiwovil.pdfIn PDF document text
    • https://mimpishiosatu.com/contents/files/82650304743.pdfIn PDF document text
    • http://kanalizace-ul.cz/userfiles/file/31334459448.pdfIn PDF document text
    • http://sentai.cc/data/file/20210911_084259_997.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/10aca15726414ec9844b5b948eb2f413/gulizije.pdfIn PDF document text
    • http://myxroad.net/upload/userfiles/file///rokopuxanurepokugadejis.pdfIn PDF document text
    • http://cartopack.be/Images/file/90542864513.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/23D8k0Ec_6w/uplcv?utm_term=your+love+is+lifting+me+higher+originalPDF 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_off0000c25c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC25C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000da73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA73 10812 bytes
SHA-256: 29126f904f72d68e659576d3cad921fece3755f63253225ddd652acd95f40f41
font_02_sfnt_off0000f333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF333 17032 bytes
SHA-256: 30c9047eacdafbeb1ed55f7678f3646b5f120540094de11c6b47819b94bc73b6

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