Malicious PDF — malware analysis report

Static analysis result for SHA-256 0add9108ff571075…

MALICIOUS

PDF

79.5 KB Created: 2021-08-06 22:20:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 463d87e6d96e4a8510f38ea14003288d SHA-1: 4a406d1953853f6a20a0231edf1acbba835be8a0 SHA-256: 0add9108ff5710751ac0e9cc65929f2839d8723f312d94fb1bcc4421fa74a780
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress upload directories, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606efb7e6e726---wigorisasofitakodaw.pdf In PDF document text
    • https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160773ea07862e---99417787952.pdfIn PDF document text
    • http://vitrine-prof.com/files/78561888271.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/ab662565379f6ad7994a9b68fc688ec9/38890629455.pdfIn PDF document text
    • https://bodymason.com/user_uploads/files/76230483416.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16083a92532b5b---88170344680.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/2cejupd2ac435u8slrldjuhpt3/delexewiremomilavapivawe.pdfIn PDF document text
    • http://gift-founder.com/archive/upload/files/dijekipiginemixafok.pdfIn PDF document text
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/26147490228.pdfIn PDF document text
    • https://demetraproject.eu/ckfinder/userfiles/files/jabutobawitatesumox.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f7867232671---63524003291.pdfIn PDF document text
    • http://medi-sen.com/files/files/suzinibujomajawujora.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb3aa508347---57858115414.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ef0b6c406---32624142093.pdfIn PDF document text
    • http://dsm-trhs68.com/clients/8/81/818e764d3414495a915a5f66638dc9bf/File/nujubewibojoz.pdfIn PDF document text
    • http://1-cx.com/ckfinder/userfiles/files/jefakiwijalukekerogef.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f72e1afbd---89310252807.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/f1df5f307e194f0e66e1b22122c5a3b2/magus.pdfIn PDF document text
    • http://qiangka.com/ckfinder/userfiles/files/28223737849.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/51ccd05d49e93c84881339045e85248f/wesejevotanase.pdfIn PDF document text
    • http://kap-group.com/ckfinder/userfiles/files/19399414482.pdfIn PDF document text
    • http://arnold-sitter.com/CKEdit/upload/files/32401468181.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/rotomif.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/736325616407b7b87624f2917c915137/rabavukumigeba.pdfIn PDF document text
    • http://sujitonweb.com/userfiles/files/rowukoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=carrier+split+air+conditioner+user+manualPDF link annotation
    • https://tes-sys.com/uploads/ckfinder/files/20210726/16272870982834.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_off0000d49e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD49E 10804 bytes
SHA-256: 61d966e4d8a534148b8b30d1e3cb7fd21cd96e147a06081372e2d288f9ac5e31
font_01_sfnt_off0000ed7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED7D 16320 bytes
SHA-256: 665d165f4cba9f20264faf0c0b76c1d61b66f0009bae80dc2bad1c49b1f85a6b
font_02_sfnt_off000117f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1