Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0968a5a5c9dc272…

MALICIOUS

PDF

83.5 KB Created: 2021-09-03 08:58:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ea232bcc77fe653ba6bfdaa9b51ca2a6 SHA-1: 39c127b21e9cd08356dac58a56157ca3812c6802 SHA-256: e0968a5a5c9dc27274f54a610f14fc1320b57800934137a994d1c64d176402ea
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and link farm heuristics indicates an attempt to lead the user to potentially harmful content.

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
  • 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://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/l1cevkh7m9h4c7fn4b85dh0032/sitasozonela.pdf In PDF document text
    • https://101doctor.com/uploads/ckfiles/files/60ce36e3ade8e.pdfIn PDF document text
    • https://aventura-agence.lu/userfiles/files/torutesudemub.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/norirubotiba.pdfIn PDF document text
    • https://mimpisiluman.com/contents//files/jejojogazajasomuzab.pdfIn PDF document text
    • https://www.asoriofrio.org/ckfinder/userfiles/files/nemijezux.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608de3057e69d---58199766636.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/10dbfdf8d10f3b51f2fe1f94a9923668/46767785818.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/faienhuusa7ur308hf0l4ak6n6/werujinefadejemomapu.pdfIn PDF document text
    • http://agrostroi-proekt.ru/ckfinder/userfiles/files/sugijafokupabonojak.pdfIn PDF document text
    • http://sztarmedia.hu/_user/file/fefivukudenopimesovasu.pdfIn PDF document text
    • https://miet.hu/kepek/34834490037.pdfIn PDF document text
    • http://www.halpellet.hu/userfiles/files/ziluluxupanitidogi.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608da765a88be---36774996617.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8cc99a589---86292711722.pdfIn PDF document text
    • http://yaeram.com/userData/board/file/20116699759.pdfIn PDF document text
    • http://good163.cn/Uploadfiles/files/37303048616.pdfIn PDF document text
    • https://srmhospitalities.com/images/bulk_images/files/14306144885.pdfIn PDF document text
    • http://mrpokedb.com/uploads/files/dunirufenig.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/17s68nf9igg8obs43bhua3df2r/47700413869.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/1ji3lheiq50jtunobm1lmapooj/84654470310.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4774848a47---xuzidarasojejo.pdfIn PDF document text
    • http://ibshop.gr/uploads/_uploads/files/fujorosedebesazajigobel.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bd529867d68---7799474102.pdfIn PDF document text
    • http://actlogistic.vn/upload/editor/files/54736125776.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=programme+musculation+femme+seche+pdfPDF link annotation
    • 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_off0000df1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF732 11168 bytes
SHA-256: aa8a3e51e8e463be20b050b0be95bd3bec1097b13416f8d39c1928eea5b8b3d5
font_02_sfnt_off000110e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E8 18432 bytes
SHA-256: 4191f679ddab59c8b058b104dea3da33a8b87c567fe70495ff386725406a4ade