Malicious PDF — malware analysis report

Static analysis result for SHA-256 98b16054e61378d4…

MALICIOUS

PDF

62.5 KB Created: 2021-09-03 10:34:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8811ec45792846f25d70f1b3e919ea23 SHA-1: fdda20e33e36dc5c4c6bb622c0eae64ceb6b0167 SHA-256: 98b16054e61378d4b6e262f69b4702e298fe87c0b94427f555ad058b096fd212
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as a malicious PDF by ClamAV, indicating a phishing or trojan threat. Heuristics reveal it functions as a link farm, directing users to numerous external URLs, many hosted on compromised CMS platforms or disposable domains. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4924

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
  • 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
  • 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://synerhu.ru/uplcv?utm_term=experiencing+god+pdf+workbook PDF link annotation
    • https://jodhpurtravels.com/nbloom/fckuploads/file/xagagusiwevodowi.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/4bf057a6bf8b44d90703530b564e2918/pagop.pdfIn PDF document text
    • http://kasargod.net/uploads/file/64651535206.pdfIn PDF document text
    • http://alfadent-volg.ru/images_uploads/files/papotenope.pdfIn PDF document text
    • http://gapoom.com/upload/fckeditor/file/23565992911.pdfIn PDF document text
    • http://tt-ural.su/admin/ckfinder/userfiles/files/bamebavoredopiguwi.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/d7112689c75260249ee26fc28abccafe/62656053776.pdfIn PDF document text
    • http://skidubravy.sk/spravca/ckfinder/userfiles/files/sinalo.pdfIn PDF document text
    • https://www.zochrot.org/ckfinder/userfiles/files/kujaposiwiv.pdfIn PDF document text
    • http://kossuthdigisuli.hu/userfiles/file/55190900713.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/18c54e174dfa23cee4dcc983430ccd2b/luguwogubefa.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/megpbiaac4fhkjslvvah1f2vv3/nokamegizo.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd5d511b17a---fejikimutubavetesog.pdfIn PDF document text
    • http://www.pro9apps.com/app/webroot/files/uploadimagesfile/91561734160.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/54964889655.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/domuwomumiw.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/b7b9cc3d231eb3cd0c78de02714b0da7/85723460541.pdfIn PDF document text
    • https://zhbiotech.com/CKEdit/upload/files/85070035822.pdfIn PDF document text
    • http://tafgambiatours.com/userfiles/file/80623099791.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc6f38c8e8---42334521566.pdfIn PDF document text
    • http://ilkyoukais.com/Images/Media/files/xepanex.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/5kd708t76dvpulc849nl048g5g/40909882181.pdfIn PDF document text
    • http://stickerbarcode.com/file_media/file_image/file/gukalikuperogibun.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d4e6b025ae8---xutadulunuzegufitivagu.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///72647500019.pdfIn PDF document text
    • http://e1pl2.nazwa.pl/busy/fotki/file/61146235939.pdfIn PDF document text

Open this report in the interactive analyzer, or submit your own file for analysis.