Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbb94ddb7bf4783b…

MALICIOUS

PDF

80.4 KB Created: 2021-08-02 19:54:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c98f33d7556e1621d51171b354b666f4 SHA-1: 3e55ab4ad68cd39b8889f275691bae7b60fe6b78 SHA-256: dbb94ddb7bf4783bbf3a9669268eba0211c582d6609999ee7abc6a64af468501
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a phishing or trojan distribution intent. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2745

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://pypconsultores.mx/userfiles/file/45500016709.pdf In PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/9120d15bec47dbd5b85e51ad20e44fe7/66064266242.pdfIn PDF document text
    • https://bdata.vn/upload/files/xubavonopop.pdfIn PDF document text
    • http://smeclassof1987reunion.com/clients/37165/File/rofosirib.pdfIn PDF document text
    • http://chronicles.ae/userfiles/files/gawazirimozavemale.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607984d0124a7---tiwimufonal.pdfIn PDF document text
    • https://taipeitccia.org/CKEdit/upload/files/57431656405.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f4fd5ef54---83212684446.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16099cb704133b---37781072126.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/10092611119.pdfIn PDF document text
    • http://speed-r.com/js/upload/files/89539285741.pdfIn PDF document text
    • http://teamhead.net/userfiles/file/42185751842.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1eb8a5446---barixurosaken.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160850d6b028c7---1245460166.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160871bb237785---migajevego.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/45994090225.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/74162246564.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/h6tcipqq6kjd68c3m01dot6dju/wumenuduneliragomonapu.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb6cbc52cc---60641711859.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/wekomesubujosogididuzel.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb01f376b6---57771195237.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/e881c0e3dc183a69cc6d8cc9c744270d/matumibadapimufoniloma.pdfIn PDF document text
    • http://oticonshop.com/ckfinder/userfiles/files/fajowexivogiloniz.pdfIn PDF document text
    • https://nguyenhungstone.com/uploads/image/files/zufitav.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e4cac7edd6e---73372289854.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080bb642713e---73942069413.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=what+are+some+augmentative+communication+devicesPDF link annotation
    • 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_off0000ea4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10266 10932 bytes
SHA-256: cf6a262445d2cea9553d5a6b4f321c4b56766069a388c53adc6883a516dba788
font_02_sfnt_off00011b6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6A 16788 bytes
SHA-256: 8fa07c8cc84350627b1b6d979c8b9fbfc4a677f019166f9c1d9bfcc1f0dd16c6

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