Malicious PDF — malware analysis report

Static analysis result for SHA-256 701e7676521fc692…

MALICIOUS

PDF

94.7 KB Created: 2021-07-03 08:52:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: be0f2a30f97a268cfef08946e6f39560 SHA-1: 8130f8c3a7ff47a7fec8467e3ec7429999672128 SHA-256: 701e7676521fc692df2caafb1ad9a3dd6ad9ca2613de2c4d4ecb8ed3a032120a
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file exhibits characteristics of a phishing and redirection lure, aiming to trick users into installing malicious software or updating their browser. It also contains links to compromised WordPress upload storage and a link farm on disposable hosting, suggesting a multi-stage attack. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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 http://birzebbugastpetersfc.com/files/file/23546969941.pdf In PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1f805432e---raradoxojala.pdfIn PDF document text
    • https://mfdesign.hu/files/file/64338414107.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/cf2cd5eb047c56ba5cadd5c30005ea45/58705713717.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16085dc276f63f---gesovogumikutoxile.pdfIn PDF document text
    • http://bsbcarpet.com/userfiles/file/13794340241.pdfIn PDF document text
    • https://yssnewlessons.org/UserFilesTwo/file/sivepanuxawupi.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffdb4f33a1---84010226536.pdfIn PDF document text
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/l3li0h3ltbsue1n9iv7dvebisr/41245652366.pdfIn PDF document text
    • https://speculatio.in/ci/userfiles/files/fefezul.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/vumuzomateramulejawone.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/272231383417.pdfIn PDF document text
    • https://luminex.pl/upload/file/doxupegozu.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/babopejebo.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210514124705_yodgt5.pdfIn PDF document text
    • http://weorderfood.com/uploads/files/zokuxal.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/9503735417.pdfIn PDF document text
    • https://vsetinrally.cz/userfiles/file/kenemipopul.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/29e2e4e76f9ebb0e9bb1bab26cc4f7bf/44343982122.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bc4db7a4312---15263758184.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/puguvagidote.pdfIn PDF document text
    • https://ptogel2.com/contents//files/puluzupizexesolikikofasif.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/1670048090.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c2bae4c2724---sunedebubikus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=socrative+student+answersPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF722 17736 bytes
SHA-256: c4a4aedcbb680fb786a9a1b174939b77d560007902c4a49d135e182e3e52a769
font_01_sfnt_off00012534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12534 16192 bytes
SHA-256: 97e3f73a58ccdd4784c9ae1678d9f90717e6b6d0c87c36bf93adb8865ef65ebd
font_02_sfnt_off00013ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000152d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152D7 10644 bytes
SHA-256: 3d96a800947db55bc65f21380cc5928b904ff05508f1f2d5a070d237fc109690

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