Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc0970b1ae4de942…

MALICIOUS

PDF

89.3 KB Created: 2021-08-16 09:12:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3767030d5a0f3376805b90fd16e3a654 SHA-1: ead6a4ceab5831b3fec9f946afe2249bcb306fb9 SHA-256: bc0970b1ae4de942771ddebe718d5a3fa5985f946db75bc835284f1428c047e3
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous compromised websites, which in turn host other PDF files. This suggests a phishing or malware distribution campaign leveraging a chain of redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 https://bititechnika.com/uploads/file/vikakudoje.pdf In PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160899b54e33fe---wudepowarobatotufebol.pdfIn PDF document text
    • https://tecnomatec.cl/upload/file/19294660818.pdfIn PDF document text
    • http://tvoirostov.ru/ckfinder/userfiles/files/78738356984.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/wujovivobaferadufuwazud.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb69f82687---28588377373.pdfIn PDF document text
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/23489558991.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/najatufufakozanegulubiwa.pdfIn PDF document text
    • https://rubfila.in/files/file/lexewijupekuwidafasokoxi.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608004868bd5d---67143949276.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/55df34c3d3920ef8daafeaa56064874a/vupetowaxilogivikugik.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16092877c04e29---73597842455.pdfIn PDF document text
    • https://kudamatsu.org/userfiles/file/3881449020.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/b315d955f6642925461f8d4f6aec5966/31605422139.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160765d5142aa1---towukefetuxefabot.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/a0n7cfv0bosc729m80rs5damhh/71335842146.pdfIn PDF document text
    • https://rawoctane.com/uploads/file/volujegaxoperufawuk.pdfIn PDF document text
    • https://tsegypt.com/file/31756599235.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/nppjv75cn8rmrnka1b7hfer5sh/vejidane.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/69b6eabd7b0df927e7ec96ffa151d9ce/72214783555.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/65204d175e49f88dc3ded958f6c70ea3/doxemizidazus.pdfIn PDF document text
    • https://www.avantagesapp.com/uploads/files/wufuzulekogeliwigep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=fast+and+furious+3+tokyo+drift+google+docsPDF 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_off0000e69e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69E 11108 bytes
SHA-256: 2be46cead56c1c77a35544460da747a89de238e104f1ffd5f6e28d27df580727
font_01_sfnt_off0001007e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007E 29520 bytes
SHA-256: 9080e54bd123a87560a72aa98ca95cfe38e1bc646829ba196df00ae797f0048a
font_02_sfnt_off00013cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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