Malicious PDF — malware analysis report

Static analysis result for SHA-256 0005b30aff0b83be…

MALICIOUS

PDF

240.3 KB Created: 2021-08-17 13:38:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 99da4d6e01f7d789366b221d03bf485d SHA-1: e8be744c1dd7430fc219724c067c3e694217784e SHA-256: 0005b30aff0b83be0f6710e8536389347daa16436c6e1ecf270a7950cb81c6de
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common phishing lure, presenting itself as a free download for 'dnd 5e spell cards'. It contains multiple links, including one pointing to a redirector on 'drafthe.ru', which is associated with compromised WordPress upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lead the user to a site that serves a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9324

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 https://drafthe.ru/uplcv?utm_term=dnd+5e+spell+cards+download PDF link annotation
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/04cddecc736aba407026af887bc4d32d/moliber.pdfIn PDF document text
    • http://gps-ambroisie.com/ressource/site-image/files/80779945492.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/161154751aa6b3---jalapagamedisametixu.pdfIn PDF document text
    • https://koreayokogawa.com/ckfinder/userfiles/files/vabasuforevijolemugolub.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/2r8gml5q4g5ms6h7j3ic309gn3/53150466847.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/hmgljkq0387ln0rdln9uptj0o5/gafatizo.pdfIn PDF document text
    • http://shepardinteriordesign.com/rw/upload/file/31996154342.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec8f7433f8---81761243291.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/17608c996d0dad8d1716ed2b7b476579/roxotofasevonivazaged.pdfIn PDF document text
    • http://cellesekorea.com/ckupload/files/mikomoxaxibatepazalofe.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c9c22314b05---mojiluxavukoj.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/rakeraletalisolixiputo.pdfIn PDF document text
    • http://nature-revive.org/files/file/88835144039.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/ffttq4lm7f5gt2l7k8fnj2on50/debumofonokubetusiwugez.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/depagek.pdfIn PDF document text
    • https://fortworthdental.net/cmsCart/upload/file/vosodowikixivejonarixo.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/99638f3e00b47aba2a0d50d7eb27b899/26831047649.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/nefatilimaxaj.pdfIn PDF document text
    • https://coevent.ru/upload/files/sepatow.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/937356328.pdfIn PDF document text
    • http://vet-arrighicolangelicristilli.eu/userfiles/files/bavasopif.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/10e8a2a7fc51fa4891c255d9a93bf975/gurubufelajopaxa.pdfIn PDF document text
    • http://snnet.kr/board_pds/fckeditor/2021/08/file/nefekuludofejezewoxi.pdfIn PDF document text
    • http://wangyiphk.com/userfiles/gitobufosug.pdfIn PDF document text
    • 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_off00035706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35706 10536 bytes
SHA-256: 86881ded7e68c8559287245a6795095947d8d176c217ca1d99756980bcc29a76
font_01_sfnt_off00036f3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36F3C 16360 bytes
SHA-256: ad58092013d1cafb85a06f1dd6cc6a3ac3728ce7f8f5ad8e5ef4f1a814931047
font_02_sfnt_off0003998a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3998A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1