Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0fce171d75668a5…

MALICIOUS

PDF

91.2 KB Created: 2021-06-30 01:33:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 70282458f18c842a66e8de17fd6bb4c4 SHA-1: 58d86efb72b52c73bad520f45f66e44d83c2a3ff SHA-256: d0fce171d75668a56d17ff84d80cb8c8267f7afe6d00ee4a576665ec5cd4101a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and ClamAV as malicious, indicating it is likely a phishing or malware distribution lure. The numerous external URLs, including those hosted on compromised WordPress sites and disposable domains, suggest an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://synerhu.ru/uplcv?utm_term=isolette+c2000+service+manual
    • http://ketoanaca.com/uploads/image/files/23794825672.pdf
    • http://techsystem.gr/data/uploads/ckeditor/files/vajegefesinuwobufu.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/21066de0ed519a53732c19239ab7e0ea/subusawotalop.pdf
    • http://sewakendragroup.com/userfiles/file/bujavexakuxeg.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adfc02d4ec4---lalov.pdf
    • http://toicodonlyson.com/uploads/files/muposuzidibulo.pdf
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/4e3bee2a968d5eb5d378b4c71dea67fc/dadufaruz.pdf
    • http://locthanhwindow.com/img_duhoc/files/45399537762.pdf
    • https://medicentrumnz.eu/medicentrum/files/file/radepovomubaxelol.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/9e3f3701376c1d9cc197ac8d9ad4c4e5/zoradapiresene.pdf
    • http://musikpark-live.de/userfiles/file/xiluxurowutiro.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b718e0dbc68---zoralunavozubiton.pdf
    • http://bagiez.com/userfiles/file/1388685152.pdf
    • https://aquafilling.com/userfiles/file/86543983770.pdf
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608219258badf---fitasipawi.pdf
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4b0806330---29311244355.pdf
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/dijs7lnjaodvcdg93461i3omd7/71337515572.pdf
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16079d40c983cf---zofomi.pdf
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/6574b238344226a630920f27dd4ff048/nawizoli.pdf
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/887074a3b17f2d6810d9ef696488490a/41885511462.pdf
    • http://casaatlantida.com/userfiles/file///91050620279.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/cdd2621072881ce2f07388e1a578cd2e/30808662721.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609dcd67aff24---jipitumusi.pdf
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/5fcfe9ec41c53b45706e31b4d99342c2/bezofisodapizere.pdf
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160706bc3a8e82---suzodevodenunalud.pdf
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9111bfd9a---96790765293.pdf
    • http://luatsuphutho.com/upload/ck/files/pawaberopojob.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eeec.bin
1700e0e7367e326dfee4a2104b398bd7349e0e1c32ba48b0aa50cf0ae7cb7995		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEC 24980 bytes
font_01_sfnt_off00012c5c.bin
54b0864713d88fec4ef55500048f21552948bfa9e8948b70ba37aec22e7f32d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C5C 10752 bytes
font_02_sfnt_off00014530.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14530 16792 bytes

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