Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd67cea9f2349662…

MALICIOUS

PDF

72.5 KB Created: 2021-09-02 10:08:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 995335f6a53ee442c512ad726ec6dcd9 SHA-1: ca1d4d01e75320b4dada15db2f2755e32148937c SHA-256: fd67cea9f2349662f1c24207cc243d334f67756bd79d81bcbf215a09b27fde83
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 numerous external URLs, many hosted on compromised websites. The presence of embedded URLs and the overall structure suggest an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 https://huntic.ru/uplcv?utm_term=grand+canyon+of+the+ozarks PDF link annotation
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd1abd56c7---9262646081.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/9a4216e4fb46af79ab5e34f0307ae10f/76986190755.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/sstspsm04tsuka5lsg6phgu4c6/funikuzoxabulaw.pdfIn PDF document text
    • http://autoset66.ru/admin/ckfinder/userfiles/files/zutulasatobafukuwopil.pdfIn PDF document text
    • http://giasudaihocsupham.com/Images_upload/files/97185386399.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c257b3ec698---tevelerisujewepifixiso.pdfIn PDF document text
    • http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/40402204026.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/1e23be167146b460c8db913b8486aa51/kaxunazezufujupujewepid.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/9461e2348f7e5842065aaebdccf07b1a/99151342901.pdfIn PDF document text
    • https://www.hermanosvalerorecio.com/ckfinder/userfiles/files/gukosar.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/a680df545c66cf0f50d27ba6614988a6/xolulolupajax.pdfIn PDF document text
    • http://kbidc.kr/upload/editor/file/1629593039.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/90547786dd1e17f757015e4be9e0074a/womilafefujazuzurinuvalo.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/86b989bb65eb1d82344615af21ef88c3/luzanowimavixone.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/nejugus.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/bbde9bec610663fefcff5a82bd83f066/39776835925.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/05c1cd51d94be9288d4cd778a14febed/zidizizunitu.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/6f7d5c8df85bb06e1ca46de45ab1b425/90054485861.pdfIn PDF document text
    • https://strechybenesov.cz/content/biviradunelikebofu.pdfIn PDF document text
    • https://ichibaninfotech.com/ckfinder/userfiles/files/27896895329.pdfIn PDF document text
    • http://carbontuning.ru/file/ladurivofab.pdfIn PDF document text
    • https://monyetjoget.com/contents//files/kujaxad.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/c112641cbcd83dcead26eb0f5597ebe6/38058979385.pdfIn PDF document text
    • https://tidymoney.com/ckfinder/userfiles/files/gizofenagidid.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_off0000ba7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD294 10740 bytes
SHA-256: 0acfda942e9da3e0066f86a3a7cf4d8c978e5920aecceea4c2150bca620755b9
font_02_sfnt_off0000eb54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB54 16316 bytes
SHA-256: 4e865e0f5876b622d075a7109d48aebe8ad09ca2f635f7aa5a883b342eacf6b3

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