Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2c347e9a52dcbab…

MALICIOUS

PDF

81.9 KB Created: 2021-09-17 18:12:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d0f474a63b4c3e37d7e7e14442a0aa28 SHA-1: 67154634270ddd5132ec8b803f9b514b6987f6bb SHA-256: d2c347e9a52dcbab515d395d66d2e66bd65fe1cf7a9df0b99f910a09419a6523
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and a heuristic specifically flagged it as a 'Payment redirection / bank-detail change lure'. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to trick users into visiting a site that may lead to financial compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://brilspa.ro/userfiles/file///81429762827.pdf
    • http://ceresasrl.it/userfiles/files/34361959852.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/161383ffab6e18---18467527952.pdf
    • http://www.saveurspoitoucharentes.com/admin/ckfinder/userfiles/files/lunefujofuwajopalos.pdf
    • http://winhazel.com/indigo/ckfinder/userfiles/files/vulipebajusefuvirasoli.pdf
    • https://exlite.it/ckfinder/userfiles/files/13168973065.pdf
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/5d5c0aln8ffbhfb74s0tspd3es/65016563524.pdf
    • http://aias.pnu.ac.th/ckfinder/userfiles/files/xinirojevesifazusubusav.pdf
    • https://foursservices.com/nbloom/fckuploads/file/wotebexizikad.pdf
    • http://veiligheidsslot.nl/ckfinder/userfiles/files/nebanabuwabixokawise.pdf
    • http://janaturismointegrato.com/uploads/file/ridovodetegozokuved.pdf
    • http://printific.com/images/contentimages/files/xusojekuzegexa.pdf
    • http://yearbookplus.com/uploads/ckfinder/files/73157654442.pdf
    • https://aldaserwis.pl/ckfinder/userfiles/files/lifejoseta.pdf
    • http://www.hz-kontejnery.cz/ckfinder/userfiles/files/loronanuwuwig.pdf
    • http://wahluenfty.com/userfiles/zuxituvu.pdf
    • http://westernmaki.com/uploads/files/76174854940.pdf
    • http://hz-karavany.cz/ckfinder/userfiles/files/torofimevatotalulepej.pdf
    • http://jsqnchem.com/upload/files/xekek.pdf
    • https://3eyamaichi.com/upload/ckfinder_temp/files/20210910213754.pdf
    • https://windsbs.biz/files/file/zozagoxomobabum.pdf
    • https://lacausedeslivres.com/userfiles/file/97582814796.pdf
    • http://thucphamchucnangmy.vn/uploads/files/93529388865.pdf
    • http://www.uc-kushiro.net/images/library/File/25108507597.pdf
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/boxevusegamogobagomubij.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=how+do+i+transfer+data+from+my+phone+to+my+tablet
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da65.bin
4391ec3c4391c9eb59d6ad35aeaa1d05ebd55184572f4c97944eeec00940e598		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA65 17736 bytes
font_01_sfnt_off00010857.bin
3311cc47e3063d053821f23d0044548738a33be02071664a564cb46d0ed8fc72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10857 11096 bytes
font_02_sfnt_off000121c5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x121C5 16792 bytes

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