Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d2b1844ac0e29af…

MALICIOUS

PDF

80.4 KB Created: 2021-09-02 13:48:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6da307d76bfab86802886b27914256e2 SHA-1: 46082f9c8602a1bdd828bdee6d73800c37332b7b SHA-256: 8d2b1844ac0e29af37758a0bca9f34ecb88be8fb86c57785881aeb12661710fb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that point to compromised CMS uploads and disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://coretry.ru/uplcv?utm_term=have+you+ever+worksheet PDF link annotation
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/nalatawepezimesux.pdfIn PDF document text
    • http://vorne-sitzen.eu/pcms/content/file/palovodepijav.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/a1aabefa4ec63097c7e9028422c1e3f2/gidimewo.pdfIn PDF document text
    • http://preserveproperties.com/userfiles/files/90851776994.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/7e698dfaba3d2a5085aec77da5b1222b/68402142884.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/5397334837.pdfIn PDF document text
    • http://extrastyle.ee/ckfinder/userfiles/files/xefadabinaxafokoliperonu.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e8b9ea11e6da98a3a034edd1942283ea/sejazajozomewuxitilapami.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/obboviuu0uvbtr5gnl92v8un70/jimubesobopuwomaripakemuz.pdfIn PDF document text
    • http://biotledlight.com/userfiles/file///mabibeduwewunipomakawigu.pdfIn PDF document text
    • http://suachuaspa.com/upload/images-content/files/mekuxabejewexupedonone.pdfIn PDF document text
    • http://avanti.pl/userfiles/file/suzinon.pdfIn PDF document text
    • http://titusrelay.com/clients/e/ef/ef304ccc03541e9e6382bef5f13b0a7d/File/86435139187.pdfIn PDF document text
    • http://eastwoodfamily.net/userimages/1938744665.pdfIn PDF document text
    • http://www.stadion-zarya.ru/ckfinder/userfiles/files/fovuxiful.pdfIn PDF document text
    • https://qkon.ca/images/file/24871677424.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607baed3132a1---faderifaretozipisuno.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/161300da909cb0---vevofejojiwevuse.pdfIn PDF document text
    • https://horgaszvelem.hu/ckfinder/userfiles/files/petidozu.pdfIn PDF document text
    • http://indagosrl.it/userfiles/files/bekoxanuxapo.pdfIn PDF document text
    • https://thebillionbottom.com/business_school/uploads/file/73991070829.pdfIn PDF document text
    • https://pristineleather.com/userfiles/file/67551348487.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_off0000d887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD887 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f09e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF09E 10412 bytes
SHA-256: 1095beb4fb977a0d4fdd7dc594a42cc242b22d0e9f795ebadcc5a721a5c0f8db
font_02_sfnt_off00010877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10877 16892 bytes
SHA-256: 1939051322e51985bc7d672ad8084380cc843b4e62137df1f934e32ccdb232df

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