Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d764323985d25cc…

MALICIOUS

PDF

72.7 KB Created: 2021-09-15 09:44:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1189da2107ee1f606193967fdde710b3 SHA-1: 719b5f78162a7f15b137edd5907bbd403d49c60f SHA-256: 9d764323985d25cc2ab7af304d65b44a5a2fc245a1a6ef6125c52c7a74d9eb8d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many of which appear to be hosted on compromised WordPress installations or disposable domains, suggesting a phishing or credential harvesting campaign. The presence of embedded URLs and the nature of the linked content indicate an attempt to lure users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://wastran.ru/uplcv?utm_term=how+do+you+know+if+your+phones+being+hacked PDF link annotation
    • https://dukra.sk/editor_uploads/files/63715998269.pdfIn PDF document text
    • http://osstemcardiotec.com/files/fckeditor/file/8806375566132a9fda2286.pdfIn PDF document text
    • https://funcarele.com/ckfinder/userfiles/files/12490524138.pdfIn PDF document text
    • https://mmgrowersg.com/ckfinder/userfiles/files/28632507595.pdfIn PDF document text
    • https://agermag.ro/mm/file/69969969702.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613e39f757227---guguj.pdfIn PDF document text
    • https://xyoaa.org/sites/default/files/files/jugezemewudovoleroni.pdfIn PDF document text
    • https://protrialse.eu/files/files/68036189217.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/cff323a40b5c935f5a7b87cb508a3f60/rokenirofurajopawu.pdfIn PDF document text
    • http://ecme.site/2015/vat/upload/files/pufiporawojagonozezamasog.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/nunetu.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161414d38a2ac4---1887111048.pdfIn PDF document text
    • http://etalentlink.com/uploadfile/file///2021090809383047.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613c3e6cd42e8---45790413977.pdfIn PDF document text
    • http://rentaruedas.com/files/others/40668431678.pdfIn PDF document text
    • https://prettygreekvillas.com/admin/fckeditor/editor/filemanager/connectofile/lapare.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613416bfe7047---vugubu.pdfIn PDF document text
    • http://quantri.thaisonpalacehotel.com/upload/files/zeluzava.pdfIn PDF document text
    • https://tradingcall.in/ckfinder/userfiles/files/kusenadegugu.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614118bbea2c5---bimofenetozug.pdfIn PDF document text
    • http://recviem.ru/img/upload/fewanu.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/waferenafirugunubilo.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_off0000bca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCA6 15304 bytes
SHA-256: a21d8989162d156e35ebf7d424153c733fa3a6ab6db85391200928274ff99245
font_01_sfnt_off0000e33e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33E 11276 bytes
SHA-256: 0f5f184f47839aa70cbf57f6faa43184971e23b67bb27090189d134951982770
font_02_sfnt_off0000fd48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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