Malicious PDF — malware analysis report

Static analysis result for SHA-256 9969c0abb1a13ef8…

MALICIOUS

PDF

70.5 KB Created: 2021-09-14 05:31:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ed3f52621a85fbf63322d65b917f508c SHA-1: b6b57f9a4102687cebb0c7ab011dc16857ed12d0 SHA-256: 9969c0abb1a13ef8b6cfa25b91bd8c9afc15ea8545c1a5eef270f3277485a9c3
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of multiple external URIs and link farm heuristics indicates a strong intent to direct users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://infrive.ru/uplcv?utm_term=gta+v+online+play+free PDF link annotation
    • http://montpellier-businessplan.fr/mbp/upload/images/images/upload/ckfinder/74272571905.pdfIn PDF document text
    • https://mama-light.net/business_school/uploads/file/rizezuburi.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/d81ca451925788eedd2040fcb4bc36a3/dorarivoxijepub.pdfIn PDF document text
    • http://www.ocptecnology.com/admin/uploaded/fck/file/86962931168.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/qlfucalqpc0p17vtv7le7p3s6q/wexojijajob.pdfIn PDF document text
    • http://yenidenyuzlendirme.com/ckfinder/userfiles/files/fojobumevugefebupofa.pdfIn PDF document text
    • http://enjoyisagenix.com/ckfinder/userfiles/files/6896527334.pdfIn PDF document text
    • https://bmw-zona.ru/uploads/file/rejipuregoradab.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/73685573670.pdfIn PDF document text
    • http://quimicahj.com/admin/userfiles/userfiles/file/kosuxemasizebefuvelalepib.pdfIn PDF document text
    • http://gyermekhaz.hu/Content/site_images/files/158997388.pdfIn PDF document text
    • http://balaton.varosom.hu/userfiles/files/3354365065.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/87431789094.pdfIn PDF document text
    • http://bouwbedrijfansing.nl/userfiles/file/nelonunumiviv.pdfIn PDF document text
    • https://tfsroanoke.com/home/tfs/public_html/new/ckfinder/userfiles/files/tenufi.pdfIn PDF document text
    • https://netron.pt/app/webroot/media/files/zeposujopeweguj.pdfIn PDF document text
    • http://lrpharmaceutical.com/upload/files/gowapunejezigukiraziruda.pdfIn PDF document text
    • http://25630638.kad.tw/kads/ckfinder/userfiles/files/50800204598.pdfIn PDF document text
    • http://paolacaone.eu/userfiles/files/befulexetasowaso.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/6f953a9a246393d99edcb0fb7d21470f/jasusedatitubiwivufekow.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161368615e9eb9---11868152906.pdfIn PDF document text
    • http://blueleaves.ru/userfiles/file/44839607490.pdfIn PDF document text
    • https://justforjetscatering.com/userfiles/image/files/tupezopiguxuwosuwe.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161305bced9ebc---sirikifuxewubino.pdfIn PDF document text
    • http://hoaisonland.vn/upload/files/xorixoben.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_off0000b60f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB60F 10400 bytes
SHA-256: e03c29938e806685ddd1add154c8ecf76931ae6388c6959989edf57f6a9b5772
font_01_sfnt_off0000cdc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e5d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D7 15256 bytes
SHA-256: 719b191c2d42f6a24f9905ddbd8e863c69b0354f22bf1396f08b9e5e0e704a85

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