Malicious PDF — malware analysis report

Static analysis result for SHA-256 a68d69bc09b1de87…

MALICIOUS

PDF

93.3 KB Created: 2021-09-02 23:25:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7b93f37fd4b436a0b039bff089a427db SHA-1: 8e15241e7c6705a6b5384eb6b1b065cc09ff9569 SHA-256: a68d69bc09b1de8756d8d04572faef21431b3c8ac1cef4978ce1c3220368225c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload storage locations and disposable hosting sites. The embedded URLs, such as 'https://pixomot.ru/uplcv?utm_term=imperialism+in+africa+worksheet+answers', are likely part of a phishing or malware distribution scheme, masquerading as educational content to entice clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://pixomot.ru/uplcv?utm_term=imperialism+in+africa+worksheet+answers PDF link annotation
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b97768b7eb1---jetekijapogituvam.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/f3im7l5lusgkt2ase13ge3hn73/2338382355.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/hl8fd6k5s78a66kafuo1g5udtk/28695502862.pdfIn PDF document text
    • http://maynenkhiinverter.com/media/ftp/file/ragawad.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/36el7ps64ebfqbgpvql50g25o3/35048441621.pdfIn PDF document text
    • http://vasset.bg/userfiles/file/zabezavixev.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/47am4dingc46mlulcvhkmi2op8/61321246420.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e74be0fbff---48672122247.pdfIn PDF document text
    • https://thebookonpersonaltransformation.com/FCKeditor/file/jexubelumuxeli.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a64150b5e6---88302889036.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/1rg8vrietgbcgkuc2lm1n2eth3/jifazavatol.pdfIn PDF document text
    • http://td-mg.ru/uploads/files/81709808082.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1677b3aa3---diruxezavin.pdfIn PDF document text
    • http://pettwayfamilyreunion.com/clients/39389/File/luzogibubivarawusizo.pdfIn PDF document text
    • https://darkoyunpin.com/calisma2/files/uploads/vobol.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9e61e6fea---pokixoma.pdfIn PDF document text
    • http://logo4you.dk/userfiles/file/takus.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7d09dfb15---lefoludan.pdfIn PDF document text
    • http://awkontrakt.pl/ckfinder/userfiles/files/jetulexewazotegoluzep.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/gep6vf8tjs5astsnn5u6bgslsm/52483120640.pdfIn PDF document text
    • http://brianhaymore.com/images/e/file/jedapikuninomelofule.pdfIn PDF document text
    • http://k3projekt.pl/uploads/userfiles/files/nonagudulebowiwamonelure.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/96459948595.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_off00010855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10855 17728 bytes
SHA-256: 45205065a4b073a84b27528ad3127882eda29e4a51793c793909428a22e9dd78
font_01_sfnt_off000136ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136BA 10872 bytes
SHA-256: d7c2b7b4c3a66931e9e0eab1669a8875a7d0d2b08edf4b3a357fe2419d86ce24
font_02_sfnt_off00014fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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