Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9d69860145ec40b…

MALICIOUS

PDF

80.6 KB Created: 2021-09-11 07:58:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 349d0840d9c3ffdaea4f867b84202961 SHA-1: ccd92f3c0832c880ed8df02082904f02be193af3 SHA-256: f9d69860145ec40b571bccbc920495cabc3767f6c57a99d636959d50327e143f
126 Risk Score

Malware Insights

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

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://anael.fr/fckeditor/userfiles/file/kosorofusakumirozasid.pdf In PDF document text
    • http://www.portaldasfreguesias.com/portugal/vianadocastelo/vianadocastelo/geraz_do_lima_sta_maria/ckeditor/ckfinder/file/wodofaroverimapuwagodesi.pdfIn PDF document text
    • https://cecprint.com/images/file/258126597.pdfIn PDF document text
    • https://dubaimotorcycletours.com/uploaded_images/files/povajolomevo.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/hcr19v8bt5p79vbjf5mlhltgqp/belaxagalades.pdfIn PDF document text
    • https://nomortiga.com/contents/files/gujisu.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/29832994933.pdfIn PDF document text
    • https://magiccat.pro/ckfinder/userfiles/files/55508457192.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/febowodoxazefi.pdfIn PDF document text
    • https://webmakler.org/userfiles/file/8231104783.pdfIn PDF document text
    • http://kiszelyugyvediiroda.hu/docs/file/86451395678.pdfIn PDF document text
    • https://aradmissions.com/ci/userfiles/files/66217340845.pdfIn PDF document text
    • https://successalpha.team/upload/files/55117636418.pdfIn PDF document text
    • https://cet.sk/res/file/pozozidawevenutinemosugaj.pdfIn PDF document text
    • http://namngonviet.vn/user-/files/89548768169.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/xakodogenugegebex.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/62687684778.pdfIn PDF document text
    • https://angelsforwarriors.org/userfiles/files/vupinezatogenuju.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/kewafubofuj.pdfIn PDF document text
    • http://s4l.vn/storage/ckfinder/files/nuxijejexenuwijusu.pdfIn PDF document text
    • https://etcbt.com/userfiles/file/nomeriribodovejigopidadi.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0b05783ef---12389671589.pdfIn PDF document text
    • http://jorkurojus.com/userfiles/file/vusefuzivobugafexawel.pdfIn PDF document text
    • http://indagosrl.it/userfiles/files/nepureponutagugojipifope.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=best+app+for+listening+booksPDF 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_off0000d619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD619 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2B 17704 bytes
SHA-256: 532a0a5633b5e2446da37728ed6e8b09eac05b60f8b377ba652b389f48cd0368
font_02_sfnt_off00011bfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BFA 10816 bytes
SHA-256: 277d3146f1b22a44d74dfa324c35e8a2e226a8124f010ab722198015ab5172b3

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