Malicious PDF — malware analysis report

Static analysis result for SHA-256 6039168e1f6211ef…

MALICIOUS

PDF

79.8 KB Created: 2021-08-27 02:06:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 575988b990366774b91d7fa8f790fc5b SHA-1: 935343de5bb4f3df118ed6f917e6c4bf9f1a1df6 SHA-256: 6039168e1f6211ef5ce040dd716f544d3bff2e36928fa5105236879f4da3b158
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish users. The document body is unreadable, but the overall structure and URL analysis indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 http://pmteventures.com/clients/5/57/576e8e71b788aac95a268099fab76a3d/File/34853181838.pdf In PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b19a2548d0---17308249837.pdfIn PDF document text
    • http://woori-tour.kr/FileData/ckfinder/files/20210710_8FDB386D7583A476.pdfIn PDF document text
    • https://monamifrance.com/FileData/ckfinder/files/20210702_8D74A2D5B4FB753E.pdfIn PDF document text
    • http://bocghedanang.com/media/ftp/file/77805333960.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/297fcb61def4c992fc4aa8242df12bc6/xonaxatefod.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6a9d25ff9---93830555681.pdfIn PDF document text
    • https://winpoasia.com/ckfinder/userfiles/files/sexusejojipigisukixuweral.pdfIn PDF document text
    • https://sambelteri.com/contents//files/lozoridur.pdfIn PDF document text
    • http://knuhpharm.kr/userfiles/file/20210619051849.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16118cc73613f2---30076996343.pdfIn PDF document text
    • http://www.grifin.sk/files/jopuwiv.pdfIn PDF document text
    • http://teaandtiarasottawa.com/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/lelapawizaruweg.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/kezanebexisewijulogowi.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/39959262548.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ee23b8a17---xuzifupatitirasanubipimun.pdfIn PDF document text
    • http://adveotec.com/img/file/50563480338.pdfIn PDF document text
    • http://xn--b1afklwjc5g.xn--p1ai/ckfinder/userfiles/files/mutuwitapowapizodujupo.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe646a4d2c---rogupi.pdfIn PDF document text
    • http://patp1ryb.ru/media/file/85575187974.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/66nutvig7k4u7fiq29e8k7dmdn/64478179888.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ff469326856---ragijus.pdfIn PDF document text
    • http://ekonopuntos.com/campannas/file/wenivafixu.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/69045443306.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=critical+dissolved+oxygen+concentrationPDF 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_off0000d508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD508 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1F 10860 bytes
SHA-256: 48f5c5480e2dde082a99f271aaa36be686fa25ae00546c182d495dba9dfc746f
font_02_sfnt_off00010638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10638 16524 bytes
SHA-256: ff0dc3f354b2d320a1d76afd3ed8d4f94a14f1005e43181f9f3e801a21b7379c

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