Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b342ecfd41c9b27…

MALICIOUS

PDF

98.3 KB Created: 2021-09-21 04:03:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fb3fb1d146163c6c614beaa68dab292a SHA-1: 1e94ba6e0617c4373ee3e3dd9b44dc13914cb855 SHA-256: 3b342ecfd41c9b27342bb8f3b2b8ddcd52db6dd71118c4f6311f7ed9e55bdadf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or scam campaign. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is part of a phishing attempt, likely to lure users to malicious 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://synerhu.ru/uplcv?utm_term=android+18+voice+actor PDF link annotation
    • https://shindah.com/images/ckeditor_img/files/zudemeperubilaworugipajuw.pdfIn PDF document text
    • http://studiotecnicomaglio.it/userfiles/files/wuzodozejuf.pdfIn PDF document text
    • http://ganteltechnology.com/system/userfiles/file/nujabilokigiparizilu.pdfIn PDF document text
    • https://rajaketiga.com/contents/files/radedudukozijobot.pdfIn PDF document text
    • http://fk-fudosan.1nino3.com/app/webroot/img/userfiles/files/64003343417.pdfIn PDF document text
    • http://bamboomfi.com/htdocs/cljr/data/files/goguradux.pdfIn PDF document text
    • http://theemasternetworker.com/ckfinder/userfiles/files/jazamodasaf.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/m14cfkad05d8b2q08j2pdtfda5/rowemukozatokasubexatu.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/6340fc97cd713790dfeb1f4075c137a8/kutuxiwivob.pdfIn PDF document text
    • http://bulmarconsult.com/files/38900181363.pdfIn PDF document text
    • http://www.hermosabeachbungalows.com/userfiles/files/koluwelozudotorosuxudetov.pdfIn PDF document text
    • http://imi.vc/upload/files/71295250523.pdfIn PDF document text
    • http://mrpokedb.com/uploads/files/figalugatubiguxogalovesun.pdfIn PDF document text
    • https://kompaspt1.com/contents/files/84767172701.pdfIn PDF document text
    • https://www.weboonline.com/ckfinder/userfiles/files/gojew.pdfIn PDF document text
    • http://www.de.ruben.pl/ckfinder/userfiles/files/89347842003.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1613ecf83f0b4b---38162431984.pdfIn PDF document text
    • http://www.polni.si/Images/files/57927891283.pdfIn PDF document text
    • https://tailormade-sales-marketing.com/userfiles/file/vipuxomapoxutufezepo.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1614530e8a6608---44030551093.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/82255086362.pdfIn PDF document text
    • https://phatgiaolongan.com/upload/ckupload/files/84226486885.pdfIn PDF document text
    • http://gma.ge/admin/ckeditor/ckfinder/userfiles/files/pebabalegonok.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_off000114e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E2 20852 bytes
SHA-256: b4674eaa48a369b353f3e9a0e0d8153d611f354502104c03dc3ec46def87c6b9
font_01_sfnt_off00014bc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000163d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163D7 10456 bytes
SHA-256: 091813eebb21380bcad682438c702477b8e552fa0c509290069e7e0c156cfef2

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