Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6ca7d8b2552fc4b…

MALICIOUS

PDF

72.3 KB Created: 2021-09-06 14:48:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ef96dccaaa1edca1f921cff0332a34ac SHA-1: 5eaf1982a90e60fd9a9bb9df572fe24145e2fe09 SHA-256: d6ca7d8b2552fc4bc364c7e7e4b3444176d52947c2e2c975d88a86c743caf7b7
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on disposable domains or compromised CMS uploads, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, so the primary attack vector appears to be social engineering via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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 http://funperm.ru/content/file/gukapafaxefulozob.pdf In PDF document text
    • http://goteneplast.se/files/images/file/jepogel.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c434024e871---82242426756.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1aced0bfe---29664371304.pdfIn PDF document text
    • http://bordahusfeldolgozo.hu/editor_up/wominarokatiduxegugu.pdfIn PDF document text
    • http://lmyc.net/clients/875386/File/30118016691.pdfIn PDF document text
    • http://sunriverps.com/data/editor/file/11866041888.pdfIn PDF document text
    • https://esportenerd.com/app/webroot/ckfinder/userfiles/files/nexevitobasazaruluwan.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/f3jft86ochh2a0mp2d2uqlhd82/besepisogirexejiragago.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a84bb459f05---bubirenitikovofuxexibile.pdfIn PDF document text
    • https://tyko.pl/userfiles/file/xiwunarotu.pdfIn PDF document text
    • http://maekuangudomthara.com/ckfinder/userfiles/files/katasazonesib.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/gktc4271355ufa7sai479310m6/doxufelixotadobitufu.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/47138486114.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e6c0ea6586d---43600246067.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf0caedce9---59349312096.pdfIn PDF document text
    • https://radekslodkiewicz.pl/files/file/36986659261.pdfIn PDF document text
    • http://j-club.eu/userfiles/file/rukavafibufude.pdfIn PDF document text
    • https://coaching-jk-academic.com/ckfinder/userfiles/files/52168333624.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/aot35bubmk94mm02bjls1mef93/refexomigudodi.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/80356543005.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161008c2979bd8---93382150722.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/43061152302.pdfIn PDF document text
    • http://dungcubepgiangtrinh.com/webroot/img/files/48865256062.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/feb79c80982dd3e4cf08444f7940b57f/runexaxomesatevavapunafab.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/fcedfe58a5531a002b52bf0057464599/1009712655.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=alphabet+word+wall+pdfPDF link annotation
    • 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_off0000ba49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA49 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD260 10436 bytes
SHA-256: 0742a15933130ec9f5ad71fe63a443ed029fc7db9e1be2fb6c0ab18d40f656b9
font_02_sfnt_off0000ea06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA06 16556 bytes
SHA-256: 2878647016e0ef963bd975eeabacd8af0a4b7442ff4465d5fc9f381b3f7272e9

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