Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aa4babc508c7389…

MALICIOUS

PDF

98.7 KB Created: 2021-09-05 01:38:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2b478fd66a1ffd44ed337e95e28a3cff SHA-1: efe0d4df375c1f4415648ad21e78e3d63648736e SHA-256: 0aa4babc508c7389f731d85ee7e8b6e92f2397343895e8a29191984fef8a8da1
64 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to various PDF documents hosted on compromised or disposable domains. This suggests a campaign focused on SEO poisoning or phishing, where users are lured to click on links that may lead to malicious content or further compromise. The presence of multiple distinct hosts and the use of 'utm_term' parameters indicate an effort to manipulate search engine results or track campaign effectiveness.

Machine Learning

  • Nyx PDF Classifier clean score 0.2141

Heuristics 4

  • 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
  • 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://studiostocchi.eu/userfiles/files/ridesufojunore.pdf In PDF document text
    • http://sdes.in/uploads/92398364059.pdfIn PDF document text
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/99659936462.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4027893c54---26830199081.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/90326547842.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/ae45a0f3e8d3f3acc7a4e2eb94e95036/60843596698.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/c88132abbc0978abdb17f37414bb3383/31963336121.pdfIn PDF document text
    • https://ville-saintleonard.fr/pdf/waluxalokusazofe.pdfIn PDF document text
    • http://appartementslisa.it/an3_Uploads/file/zedasureforutim.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/ijteatjaaou0l3grknfptmu6o1/wexuvamemowifad.pdfIn PDF document text
    • http://kunbot.com/upload/files/65001913069.pdfIn PDF document text
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/gamovizodativagijemafelu.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b05121c5816---43832181564.pdfIn PDF document text
    • http://studiodabo.eu/userfiles/files/97988698692.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1621392661.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/62164731419.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/6b74e0d01d3bec2a7041c6cca3bbc37d/79866245630.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/4b04lp5gra4mi11ic2rplhrd32/xoxorol.pdfIn PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c107ad88d50---95027811947.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/81bf325744167df2e9e643a81e7cf4b1/ketowovilosa.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/t0ethd67krfcke9i40ml2a19rr/zafopinize.pdfIn PDF document text
    • http://francescasciortino.it/userfiles/files/98625444342.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/36481210618.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/bt58q03ic95c2pta2b5g32p61g/25100741580.pdfIn PDF document text
    • https://menu2uplus.com/images/file/26321507418.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=csb+spurgeon+study+bible+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13287 19076 bytes
SHA-256: 4109652d5a1b5a298defc68d24bf9ae57686e6b3f56f4f8340894f8041e2891b
font_01_sfnt_off000163bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163BC 10896 bytes
SHA-256: ac2a02c2d54ec18456192f46173f0e86456d3324a293ab5fc4b5c28e819a7ae4

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