Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e2d208a78dbc8a…

MALICIOUS

PDF

81.0 KB Created: 2021-09-12 20:07:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: fc0ee40e6f69668f9469f97501e4aba0 SHA-1: a466cbbc0aa0addafa7d789846b8c9ac859be9cd SHA-256: 80e2d208a78dbc8ad46f41efba065f624a14262e87a48d36f7b8d0f091b97723
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting an attempt to lure users to malicious content or phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a link farm used for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://medarbindia.org/ckfinder/userfiles/files/dejosugotozotuwuwebe.pdf In PDF document text
    • http://margheritango.it/userfiles/file/jidixefu.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/16139bbe7bc5de---68855897523.pdfIn PDF document text
    • https://www.hosotte.com/ckfinder/userfiles/files/99296255661.pdfIn PDF document text
    • https://ip-kamera-rendszer.nuttydog.hu/ckfinder/userfiles/files/fezawi.pdfIn PDF document text
    • http://hophungvietnam.com/app/webroot/uploads/files/redagizuzidovikabopu.pdfIn PDF document text
    • http://arqing.es/ckfinder/userfiles/files/nukogaxuk.pdfIn PDF document text
    • http://thevisionkharj.com/userfiles/files/vokojaduzadibagosegube.pdfIn PDF document text
    • http://dezis.ru/uploads/files/kames.pdfIn PDF document text
    • http://attep.com/home/sandbox/domains/heekee.com.hk/public_html/ckfinder/userfiles/files/61619574963.pdfIn PDF document text
    • https://cuatudongsaigon.vn/uploads/files/62688500282.pdfIn PDF document text
    • https://lotteppta.com/beta/assets/file/59169794759.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/161329c8d2c44f---56253795817.pdfIn PDF document text
    • http://besteva.com/upload/files/50612290226.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/xedilisisafikukorepit.pdfIn PDF document text
    • https://viadagio.be/userfiles/file/42527348722.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/57003993067.pdfIn PDF document text
    • http://wksystems.net/HotelEstimator/userfiles/file/kixifuniboxipen.pdfIn PDF document text
    • http://www.optimizecost.com/admin/ficheros_fckedit_subidos/lusuporekumu.pdfIn PDF document text
    • http://ohmamakitchen.com/uploads/files/fesakodonatewuvulufo.pdfIn PDF document text
    • https://mgs-on-track.com/uploads/misc/files/sinikego.pdfIn PDF document text
    • http://hanilkwanla.com/uploads/files/19303344749.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16130e065e9410---tuvon.pdfIn PDF document text
    • http://podwierzba.eu/ckfinder/userfiles/files/kavapepatan.pdfIn PDF document text
    • http://meskerjager.nl/media/files/12547483563.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+connect+android+phone+screen+to+pcPDF 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_off0000d8fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FB 10644 bytes
SHA-256: 7c1cfbb3a7b6a39d933c27d4f1ad878184cb6a26798250672c912e20bd5ee60a
font_01_sfnt_off0000f149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF149 17144 bytes
SHA-256: 8b0faf6d6409875cf48299053d2364c6a28a2eb4d13a8500fe756d8cd4996a57
font_02_sfnt_off00011da8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1