Malicious PDF — malware analysis report

Static analysis result for SHA-256 d01eaa452a4f43e8…

MALICIOUS

PDF

69.8 KB Created: 2021-09-28 09:50:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 550dfd2c46b6084834fa9ccdae0f7525 SHA-1: c9792baa4f16f57d06767ea1f7fcc4cd5086092d SHA-256: d01eaa452a4f43e8a073cb16da0eaa70a2f3e04069e1c6432c2a678a22d23b41
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://oniceh.ru/uplcv?utm_term=flip+match+and+win+castle+clash+2021 PDF link annotation
    • https://loppisidjupdalen.se/images/uploaded/file/62371616099.pdfIn PDF document text
    • http://kramnyca.info/img/upload/editor/file/romixamexizuba.pdfIn PDF document text
    • https://vietnam-pump.com/userfiles/file/33115145008.pdfIn PDF document text
    • https://schachverein-marchhoefe.ch/fcsr/news/upload/file/xebusemamafokek.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136f9942e33e---kemulivumor.pdfIn PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/rimimuvokomuso.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/161442b8f7a070---tegepopenagixiz.pdfIn PDF document text
    • https://edusfera.pl/upload/file/bilosukaret.pdfIn PDF document text
    • http://tomgiongvip.com/uploads/files/file/40138497540.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/pakeze.pdfIn PDF document text
    • http://handinks.com/ckfinder/images_store/files/46158606612.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/tadujujofarajexalazu.pdfIn PDF document text
    • https://www.fyna.com.au/application/third_party/ckfinder/userfiles/files/kedujupimokemofino.pdfIn PDF document text
    • https://ikima.fr/uploads/file/xaxejuregeduvimana.pdfIn PDF document text
    • http://samarthservice.com/userfiles/file/62689811664.pdfIn PDF document text
    • http://www.themixchange.com/userfiles/files/kukiburezanixopilozifaf.pdfIn PDF document text
    • https://rugerwafers.com/demo/ruger/beta/userfiles/files/dekisafamonivajodepomob.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137853ba6c61---zokiriwixodobi.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/8a2d7301c81f1a564fb09ebb4f8dd2d6/52488791777.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/4765595ddc936fc18a46504b575b4e09/90444285543.pdfIn PDF document text
    • https://www.cosanuesa.com/componentes/editor/ckfinder/userfiles/files/29470288746.pdfIn PDF document text
    • http://cpgny.com/userfiles/files/mifowexuborodorubiv.pdfIn PDF document text
    • https://loffoxfitness.mvwebsolution.com/userfiles/files/gozarowejivoz.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_off0000b11f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB11F 15740 bytes
SHA-256: 25609dc1a1371e14fe7e865e9fd599e3c3c7c8857adfd25ca6f30cc3725bbb75
font_01_sfnt_off0000d8a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f0be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BE 10916 bytes
SHA-256: 87cc5d7a93e4c661a1fe7831c8855afa5132ca43c13804fa4a4c7a18de04278c

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