Malicious PDF — malware analysis report

Static analysis result for SHA-256 384507db70591d64…

MALICIOUS

PDF

82.5 KB Created: 2021-09-20 00:54:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8400e59d5ff384eb0bfe64d51f035bed SHA-1: 677301183a4cfeaf5444403e2f79af9df90e805b SHA-256: 384507db70591d64fbe551cf6b133a4d382a98b22f1a4d211457a616b0ef5a71
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting, indicating a link farm designed to redirect users. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports its malicious nature. The document body is heavily obfuscated and unreadable, but the heuristic firings strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://edituj.cz/res/file/vipozeritukenakasojaxij.pdf In PDF document text
    • http://paulbwatkinslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/ragaxe.pdfIn PDF document text
    • https://znalac.com/userfiles/file/wosekideramefogafepu.pdfIn PDF document text
    • http://em-mould.com/ckfinder/userfiles/files/dimugujasakowaka.pdfIn PDF document text
    • https://latrinquette.com/upload/editor/file/sidumom.pdfIn PDF document text
    • http://wittymall.com/multimedia/userfiles/file/nibogipaziwurezixixunimo.pdfIn PDF document text
    • http://africalegal.nl/userfiles/file/zepaw.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/ed15u4kca86varfhsheoi6f5ko/sezuwipafijafave.pdfIn PDF document text
    • http://sirindhorn.net/upload/File/bidosuzidiz.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/53305841264.pdfIn PDF document text
    • http://rlmlaw.com/images/edit_images/file/sapetufovuwa.pdfIn PDF document text
    • http://www.nachtruhe.info/up/files/koneseruwinufepukukoz.pdfIn PDF document text
    • http://dagmare.de/userfiles/file/jipimamonukabodux.pdfIn PDF document text
    • http://appli-veolia.net/ckfinder/userfiles/files/67486592923.pdfIn PDF document text
    • https://whitesal.com/data/images/file/5488_20210915215540.pdfIn PDF document text
    • https://big-affaires.com/img/pics/files/jetikafuf.pdfIn PDF document text
    • http://studiolegalebisantis.it/userfiles/files/munofapizemi.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/161459030c2168---rexapoz.pdfIn PDF document text
    • http://elma1.ru/!upload/files/volurikutituzaxi.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614082119f929---febonasajobomozunamufisa.pdfIn PDF document text
    • http://qhchemicalsfeed.com/upload/files/8512793836.pdfIn PDF document text
    • http://domario.ru/userfiles/file/90476691249.pdfIn PDF document text
    • http://security-m.jp/tool/images/file/18077762592.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/518ff55479024178121eec310e58de19/26825696667.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=facebook+messenger+apk+for+pcPDF 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_off0000dae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE3 18772 bytes
SHA-256: 39194046b2c60b0ac65e9ab6512bdc2efeb096105584a1efd9a0d9c8cf43d964
font_01_sfnt_off00010bde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F5 10796 bytes
SHA-256: 9819e0c31a7800261ddaff9eb4d733cac24fc5ffa510bdc00afc40549e4d1d40

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