Malicious PDF — malware analysis report

Static analysis result for SHA-256 08bc1c466069501c…

MALICIOUS

PDF

80.9 KB Created: 2021-08-20 00:01:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: a153fd594f2a02e420a094d5526a6ac5 SHA-1: 55c37f829e74d4244c9b92cdcdffbbcc8be60428 SHA-256: 08bc1c466069501c548f4841dce3239745a4ba4dde3c1df4bc41a56d57e1db3c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://pixomot.ru/uplcv?utm_term=elvis+presley+blue+hawaii+full+album+youtube PDF link annotation
    • http://www.zywawiara.pl/pliki/wozivazuxekide.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/411hlf07p5nh7n80is6b8tn2kp/40232464342.pdfIn PDF document text
    • https://abicecream.ru/ckfinder/userfiles/files/10598537107.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/377bf7d2f3bdb90de0574695a9ad5925/28818519019.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/l0ngr1b5aqfhgjm0a70kuoe1hq/wufowo.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/m0lsqh1p69ak1mtmu1ktcf1vo7/3100935639.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078cb962480b---57962674772.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/1533c66833ad4119ccfc0e5feb5b09f2/kowugunuj.pdfIn PDF document text
    • https://radekslodkiewicz.pl/files/file/8527313430.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/0bbjoqttu43ti8gnl7q75sadvn/69688728682.pdfIn PDF document text
    • https://hirurgija.me//files/88650265447.pdfIn PDF document text
    • https://appfacile.it/file/nogovobamoraxikuvupemuli.pdfIn PDF document text
    • https://moulindelarroque.com/userfiles/file/46982004824.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160788ccaae16f---77840638513.pdfIn PDF document text
    • http://bbfederico2.net/userfiles/file/kapibazozul.pdfIn PDF document text
    • https://visualmotion.nl/uploads/file/94706598560.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/e6026f18303955df129aa5b93fca9a98/33283229188.pdfIn PDF document text
    • http://cosmeticdermatologymiamibeach.com/uploads/data/files/gaxuwizotorikomaxibaxonap.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609449817e6b9---67850703210.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/negubo.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/fudadu.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile///sixipetanerususotupi.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e188680a914---lenamuworizifixatabulokag.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_off0000d40e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD40E 11008 bytes
SHA-256: 6bfb67ef97811c0fd758ac21d390bbe808b0678b07b29ecad9d1aaa6d595d975
font_01_sfnt_off0000ed7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED7D 18184 bytes
SHA-256: c9c0b195a26fa17c728974ddce719487f39fe96c330711adc9de4367a30341a6
font_02_sfnt_off00011dcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DCD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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