Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff602edf4d7d438f…

MALICIOUS

PDF

215.9 KB Created: 2021-07-05 19:52:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 58a63a33488102c2f8738ab6f025f042 SHA-1: 8ffb63fdc453035c6a096c32e7ca964982ef8b54 SHA-256: ff602edf4d7d438f8619c981970a51a4c171ca47c1907146325cd6f552a9259b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, with at least one pointing to a compromised WordPress upload directory, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery, likely via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9509

Heuristics 5

  • 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.
  • 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://asdgolfclubtoscana.com/writable/public/userfiles/file/xolilajokivozodamala.pdf In PDF document text
    • http://zulassungsservice4you.de/bilder/file/10045734670.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/efd769a0abf939e176bde34a07f58a16/zojijexidapoj.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/6761748cc6d8e54cad4d48be94383619/59320667281.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/bekivugizuvapodulifir.pdfIn PDF document text
    • http://maternites-catholiques.org/ressource/site-image/files/99501784858.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/89103268265.pdfIn PDF document text
    • http://ca1970.com/clients/10044/File/nixupelupatiwulogoja.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16088286259277---60801372763.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/68716515bf20307b44b676a4bcabf159/jugokades.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/vdq32rdp60hl3tbmdjlkn0f6q6/rovivixadunefesodabis.pdfIn PDF document text
    • https://eberli-medical-supply.ch/upload/file/vinafipesezol.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/5j2ei1ejmu9khjfkblkob9nr8l/ruvuvuvunasariwa.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e0eaaf784---sigelivo.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/dojimabakezesaligebi.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/kenoz.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/fa220d667a87e2284f4ad8c72b9c89c4/pazajidamimalelaseb.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ed51367fa2---6802012816.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa4386c44b---70257444194.pdfIn PDF document text
    • http://kardelendalgicpompa.com/uploadfiles/file/kerebibebowifola.pdfIn PDF document text
    • http://xn--80aagkbrca3apkgkee0a1bi.xn--p1ai/ckfinder/userfiles/files/negazolexidoxavimelo.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/ei8i3o5pm43q1jdtvt2nd3kak2/56826782171.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/202bb1d83be29d68b00471f9168f36ba/85411046044.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/846d6881b2139be8a395481b390f190a/sesufenelavuvuv.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/jje1e8e9m3p16qavh92nr1r9t5/karabininosixuret.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c517beaa08a---69389943252.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=applied+electricity+books+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0002bf3b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2BF3B 17960 bytes
SHA-256: e401e63fefc0657d4de9f69b416d7fa5254ee92171ec2aecccd50964c76fa1a1
font_01_sfnt_off0002db59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DB59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002f36b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F36B 34192 bytes
SHA-256: e5176bc7c2976a668e3c5dcb4988d8b58daba0d290b394c8082df82209ecfeb3
font_03_sfnt_off0003387b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3387B 10672 bytes
SHA-256: 3ceb2a5c30b8539b4f39ce706ed246d2707e16df9d55594038f707a212400fa1

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