Malicious PDF — malware analysis report

Static analysis result for SHA-256 74f48102862d92ee…

MALICIOUS

PDF

83.1 KB Created: 2021-09-08 06:52:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 96c1916dd5286d2b963d00c27beb9949 SHA-1: 81601f4a7546b5eaacd33420b875832b5c533e2d SHA-256: 74f48102862d92eea032789508a1433e1111b85a8607fc2b1a28581c0020f3e8
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. The presence of multiple external URIs and a link farm heuristic points to an attempt to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://crewmak.ru/uplcv?utm_term=plantador+manual+bico+de+pato PDF link annotation
    • https://3drm.bg/uploads/pictures/files/83356822314.pdfIn PDF document text
    • http://insureacompany.com/userfiles/file/giwusiwegomofixitadasama.pdfIn PDF document text
    • https://pfollowers.com/ci/userfiles/files/vedomubapebirow.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/b23d3e99b25a2996682393bdd42aa171/mugamebinuniza.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/d9a8624289d094f95d120be375bebf60/63057060180.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1611e61a02245d---limamot.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160968a8bf342b---81648777417.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1607205f67b35e---narudegedujesu.pdfIn PDF document text
    • http://prograsifkalip.com/files/fisarilifebodazarega.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///jizapujitiguzulakukavado.pdfIn PDF document text
    • http://webursitet.org/Files/file/5806042442.pdfIn PDF document text
    • http://www.themixchange.com/userfiles/files/moxonemabajigujegap.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/770ed93cf566945eccb95c2dfcb07044/fewejunekovojudumim.pdfIn PDF document text
    • https://renault-service.com/userfiles/33460989903.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/99924312868.pdfIn PDF document text
    • http://yuanjen.com/ckfinder/userfiles/files/kiwir.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab8a45acf2e---wuxopa.pdfIn PDF document text
    • https://himalmanpower.com/ckfinder/userfiles/files/reson.pdfIn PDF document text
    • https://aep-tc.com/cache/fck_files/file/25813993612.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/u6llj4qnlj8aq1v36ffq75kmlp/39681019035.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/sodajepuzamolade.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/wazudubujulufamirisamovu.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/678fb11ecc0de0f883c47552fd7981af/paranuwojajidix.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/girusitupoputafodoro.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612641de2e48f---duragasovedakamowiw.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_off0000dd8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8E 18628 bytes
SHA-256: 11033f34dba98cff27f44f3bd46b387611a11d19956606f2cebd021be34b7df1
font_01_sfnt_off00010e36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E36 10748 bytes
SHA-256: ac6ce018a70fa2cf691cb55533da77cc856d891e5db2fe61203be703d102c113
font_02_sfnt_off000126a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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