Malicious PDF — malware analysis report

Static analysis result for SHA-256 568156541583467c…

MALICIOUS

PDF

86.3 KB Created: 2021-09-12 03:31:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a693e938494901411ebbd8527b0d4bbd SHA-1: 958b6a574c967dfaa5a9748277dc81692c4bad63 SHA-256: 568156541583467c9dd919a4a97d1d708fc8bb29f83309d3dd962baa14b972d0
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by ML classifiers and ClamAV as malicious. It contains embedded JavaScript and multiple external URIs, some of which are hosted on compromised CMS uploads or disposable domains, suggesting a phishing or malware distribution attempt. The presence of a 'Payment redirection / bank-detail change lure' heuristic strongly indicates a business email compromise (BEC) style attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 9

  • 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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pixomot.ru/uplcv?utm_term=how+do+i+transfer+my+contacts+to+my+tablet PDF link annotation
    • http://studioarchperissinotto.eu/userfiles/files/97514776827.pdfIn PDF document text
    • https://www.frontieregypt.com/sites/all/libraries/ckfinder/userfiles/files/bubivikezojef.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/43vroiqsbsi1pbamr50jmu5a20/napozidovamejuwulov.pdfIn PDF document text
    • https://apaman.ti-am.jp/js/ckfinder/userfiles/files/25715569016.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/nefovanakoburebam.pdfIn PDF document text
    • http://gyndoktors.de/ckfinder/userfiles/files/degogufezetapepov.pdfIn PDF document text
    • https://rkdestate.com/userfiles/file/welinexogisorifasakadaneg.pdfIn PDF document text
    • http://epoch-making.jp/js/upload/files/zosunojobaxer.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130e8d095969---jujama.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f18ab6ae43---xedagumixivirobagizamepa.pdfIn PDF document text
    • https://sportuna.be/ckfinder/userfiles/files/5892856227.pdfIn PDF document text
    • https://maggies-handmade.com/UserFiles/files/mowanogagesile.pdfIn PDF document text
    • http://rydelko.pl/userfiles/file/57186217923.pdfIn PDF document text
    • http://dongamold.com/fckeditor/upload_files/file/96636013313.pdfIn PDF document text
    • http://snuhonors.com/userfiles/file/75167033227.pdfIn PDF document text
    • https://hirurgija.me/files/rodigijufokowow.pdfIn PDF document text
    • https://cryptoshift.be/anaeter_capital/siteadmin/userfiles/files/14025529112.pdfIn PDF document text
    • http://historico.uts.edu.co/portal/app/ckfinder/userfiles/files/65557865412.pdfIn PDF document text
    • http://uran-berlin.com/userfiles/file/rexosivinasi.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/sezexekosusavoxuriv.pdfIn PDF document text
    • https://ataru.site/js/ckfinder/userfiles/files/10245127884.pdfIn PDF document text
    • http://tianlanlawyer.com/filespath/files/20210912060620.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/vevijemifuzigipasanu.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16132107173259---9782981012.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_off0000eb03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001031a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031A 10968 bytes
SHA-256: d8c3159194341e0593e07bac4fc8e73f14d22c2e05a50fea164aee0ae170553b
font_02_sfnt_off00011c94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C94 18048 bytes
SHA-256: 544a56efc9aa54d4bc3e61def0c024da6321ac0055ce15837a4138ba5f5bba55

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