Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bf7bb8f386cf84a…

MALICIOUS

PDF

85.5 KB Created: 2021-07-30 08:04:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7ee6cc90c8e94361ce93c26ace058417 SHA-1: 3de69105e06c5ee85da4fafc0c6a42e5a6f125ba SHA-256: 9bf7bb8f386cf84acd31309c4b09f13c5dd0b38eba1e7a689c458328d92c25ee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning model and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites and disposable hosting, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and link farms points towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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 https://huntic.ru/uplcv?utm_term=is+magicite+ore+in+minecraft PDF link annotation
    • http://forumts.com/ckfinder/userfiles/files/muzukulokig.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/e95e5bc42e3a20f1207411e61d83ef2a/99622669206.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/buxamabujisigebenefero.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821ab686ac5---gumivuxuvojez.pdfIn PDF document text
    • http://turystyka.powiatlubartowski.pl/admin/ckfinder/userfiles/files/bunuzawisirimifukijafenit.pdfIn PDF document text
    • http://brunagabriele.it/userfiles/files/47926866567.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/154661bfb7becbf760def75b3ea82c31/telujedisosijodawazuv.pdfIn PDF document text
    • http://cerescommoditiesltd.com/Images_upload/files/mafexawigenijeka.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/160848e2d2095b---dugugiruzujadoz.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16091ea4e875e0---82054125350.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160db5f0819856---75445855030.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/c5c76c1caa69d3ceea1d5e76f99de2d7/94162156104.pdfIn PDF document text
    • http://artpolinakuzina.ru/pict/file/61291820421.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b34fff1485---mevubenatizekizofig.pdfIn PDF document text
    • https://educationindiajournal.org/ckfinder/userfiles/files/rikorovikekogibinopixos.pdfIn PDF document text
    • http://short-story.ru/upload/file/jizopafikagarerudegi.pdfIn PDF document text
    • http://msamericapageant.com/clients/873634/File/woxoperukesuf.pdfIn PDF document text
    • http://helloshoppingnepal.com/userfiles/file/zixenarul.pdfIn PDF document text
    • http://www.rify.us/cms-uploads/files/livifaredinaso.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f312bb01da---ledowuw.pdfIn PDF document text
    • https://havanic.com/cache/fck_files/file/84207294286.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724322454d0---62491426750.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/0a92d11c8d945899fdfccbaaa5d2dda9/rufakes.pdfIn PDF document text
    • https://net-mex.hu/ckfinder/userfiles/files/54450532570.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202107280042351525.pdfIn PDF document text
    • https://digireg.nu/upload/pizokukogoruxupegunozaki.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_off0000e9cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CC 17328 bytes
SHA-256: beb811dcc057fa66968b752e71d796e4eab67a689b07150e24e8065d495b43b5
font_01_sfnt_off0001177b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1177B 10584 bytes
SHA-256: 314b69324b9472efeff75bb738d10fbe7b7782809483b01031aba3e8110d752f
font_02_sfnt_off00012fa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1