Malicious PDF — malware analysis report

Static analysis result for SHA-256 970e358496e061cd…

MALICIOUS

PDF

68.7 KB Created: 2021-09-30 10:55:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 24131d46e84d94f1912d7aa624d930a4 SHA-1: f5d4e2ac825dc36d819f2425e9e614a1b2ebe345 SHA-256: 970e358496e061cdb1092ea43f2de1711a6f3b7f0a43e01441917860b7f5238b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised CMS uploads, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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://garglob.ru/uplcv?utm_term=past+simple+choose+the+correct+answer PDF link annotation
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/cd1dc6ddfbf800eafa87a05088e8c516/74306687266.pdfIn PDF document text
    • http://tlca.com/Content/uploads/files/naxugeru.pdfIn PDF document text
    • https://szemvidito.hu/sfwkr/feltoltesek/Images/Image/43164469675.pdfIn PDF document text
    • http://chaputlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/77814046736.pdfIn PDF document text
    • http://hidramaco.com/files/files/98819634177.pdfIn PDF document text
    • http://lsneotek.com/ckupload/files/lujiwefut.pdfIn PDF document text
    • http://odesignlab.ru/admin/ckfinder/userfiles/files/53906213853.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/vedam.pdfIn PDF document text
    • http://lidaoxc.com/upload/files/judaxax.pdfIn PDF document text
    • http://www.singchai.co.th/ckfinder/userfiles/files/17324346298.pdfIn PDF document text
    • https://playworkspartnership.ca/sites/default/files/file/wawakaze.pdfIn PDF document text
    • http://queensparkview.com/image/upload/File/wodof.pdfIn PDF document text
    • http://irk-yoga.ru/upload/files/jomujavapazojaz.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/357cef32fa3126d7e054f9c0b2c0fd27/lelividudixukeja.pdfIn PDF document text
    • http://ymjgolf.com/file_media/file_image/file/71931932569.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/ksfp8prbj8pi3p94a7ksg8e7ps/fumabato.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/dudimadewesizobureb.pdfIn PDF document text
    • http://0953057778.kad.tw/kads/ckfinder/userfiles/files/vuxurodab.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/161512c82bb784---36323260418.pdfIn PDF document text
    • http://orvosvalaszto.hu/uploads/files/1218465977.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161364f301d209---sifaratos.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16138c370db6ae---veropemizavib.pdfIn PDF document text
    • https://capitalsyndic.com/userfiles/file/72969802731.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_off0000ae9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE9B 10724 bytes
SHA-256: 404c7861965337cc8c78b92b0e4c1d478583d5d71fd54f147cca9b0c8b1dce73
font_01_sfnt_off0000c719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC719 14632 bytes
SHA-256: 919d2cd927faca0711dcf80ef29e4726f4163bf59bdad8932750b1c573c6efe4
font_02_sfnt_off0000eb7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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