Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0f0046253786118…

MALICIOUS

PDF

80.7 KB Created: 2021-09-18 05:48:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 25315e4433096f119a47d523060b7097 SHA-1: 5cde693175a96d214b20059120a120857cabc653 SHA-256: a0f004625378611813e4899933ed7a96ade8ae32148f373808e88480fd1cd4d9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://nomylo.ru/uplcv?utm_term=the+secret+lives+of+sgt+john+wilson+pdf PDF link annotation
    • http://rrarental.org/upload/file/sigutumus.pdfIn PDF document text
    • http://aktifbant.com/resimler/files/vudozewiregade.pdfIn PDF document text
    • https://mbzl-pro.xyz/web/img/podborky/files/99790831024.pdfIn PDF document text
    • http://veoguidecostarica.com/ci/userfiles/files/99671452411.pdfIn PDF document text
    • http://aliguoriarchitetto.eu/userfiles/files/50139818711.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/74992576292.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16145122fca437---lokabax.pdfIn PDF document text
    • http://ankaraeksioglu.com/resimler/files/52872336208.pdfIn PDF document text
    • https://tourgardan.com/basefile/tourgardancom/files/43741113873.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/wabirifajewitijobali.pdfIn PDF document text
    • https://ksboutlet.com/file/files/tizug.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/k5aftg36rljep2md3v5omqo7e9/83517693923.pdfIn PDF document text
    • https://rrr71.ru/upload_picture/88883679999.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16143005c47880---godepaw.pdfIn PDF document text
    • http://ecoaga.com/documentos/file/36503211654.pdfIn PDF document text
    • https://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/mirakazeguwowojugu.pdfIn PDF document text
    • http://universalgroupautos.com/files/others/17190348658.pdfIn PDF document text
    • http://nincity.de/inline/file/galepamamuzuzebiv.pdfIn PDF document text
    • http://ji-tien.com/userfiles/file/2605505008.pdfIn PDF document text
    • http://jkbprivateiti.com/userfiles/file/fijodoj.pdfIn PDF document text
    • https://dycmc.com/DATA/upload/files/202109180402464903.pdfIn PDF document text
    • http://slbreakingnews.com/ckfinder/userfiles/files/litufo.pdfIn PDF document text
    • https://cantarefides.ro/admin/userfiles/file/vivipusixuxatometovi.pdfIn PDF document text
    • http://khodahoanglang.com/admin/webroot/upload/image/files/23560074352.pdfIn PDF document text
    • http://gruaszarate.com/ckfinder/userfiles/files/64412177672.pdfIn PDF document text
    • http://smartpaintingplus.com/userfiles/files/domolowazu.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_off0000d6fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF15 10984 bytes
SHA-256: b541bf6da1ca061c5bf030a9adcd9b7b1fd3450d86b24a948b2aefa852f97d1d
font_02_sfnt_off00010855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10855 17356 bytes
SHA-256: ce99f0c1ae37981f1fe2a108644ead1639cbb0a19e7bbf253124cb3405ce9727

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