Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fd5764166d3ef22…

MALICIOUS

PDF

73.4 KB Created: 2021-07-13 16:38:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 898264ff49f3d3302a964db44122361d SHA-1: 7caa65e0bb665e91935af4fd75f88ccc4e1c07f1 SHA-256: 1fd5764166d3ef22b6710fe925f392616da816e9750b859f1492fc42ce466c4a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of links, many of which point to compromised WordPress sites utilizing the Super Forms plugin. These links likely serve as a link farm to redirect users to malicious content or phishing pages. ClamAV detection further supports the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

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
  • 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://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/6macos3k7esetgfsn9rh2vjr9u/54121445181.pdf In PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/5821304ed7c0e71ce82257ba78376533/9566011868.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/manulisezalegop.pdfIn PDF document text
    • http://inter-travel.hu/_user/file/6742186369.pdfIn PDF document text
    • http://currycornersugarland.com/admin/images/file/53055589840.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/diredunosel.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/v35d93u3te673pr668cqk5c4n5/56316672402.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/5b773e3b3720541b81fe1b5be2be3c75/26309569643.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/3a535b39cfb9b3fb19f9ceed3cb37773/56520013849.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084228785bd8---86257942424.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/ef15c749c672eb474b0b7eb958209972/25073289260.pdfIn PDF document text
    • https://eminesenlikoglu.org/resimler/files/boxetesesas.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog//file/80979828952.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df329a38e0---kanatadulad.pdfIn PDF document text
    • https://penzionradvanice.cz/res/file/63654629437.pdfIn PDF document text
    • http://csim.jp/ckeditor/uploads/files/mevusezizuzegakodere.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/fonurodojifetasovigomokiw.pdfIn PDF document text
    • http://fitviewer.de/files/file/20577557750.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///54468075995.pdfIn PDF document text
    • http://chaitraglaze.com/uploads/lagarikitisudasex.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/42163926d37060b94062b679bd5ba4ce/gusim.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/88bee1e71edc743d4d1fbecbebf173db/gaxaj.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/89588203571.pdfIn PDF document text
    • https://ukmalayalamnews.com/userfiles/file/zavasujuxamupixewul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=a+guide+to+graphic+print+production+pdf+downloadPDF 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_off0000e5ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fdc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC3 10896 bytes
SHA-256: 8d0f398e3f99c114ae20f4e53ad1e032f1ffb8414c627f381988dcfcd772b168

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