Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4f95c48eba4bf23…

MALICIOUS

PDF

62.5 KB Created: 2021-09-05 04:52:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 4106a3d1a60f6372ea9c9a4efab42d45 SHA-1: b5cd12827c4e2833f52684aba204688361d375ba SHA-256: b4f95c48eba4bf2353be4448aec3bce859e9d30259752c6b5f32c3a59ec7227c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5277

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://slippersymposium.com/clients/875641/File/74421566571.pdf In PDF document text
    • http://tasarimak.com/ckfinder/userfiles/files/bokobalebefasos.pdfIn PDF document text
    • http://dangkydoanhnghiep.org/hinhanh_fckeditor/file/zokalebuwamirebisajug.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c88eb1a9517---wururu.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/917dd389db5d05fa4f845a63cfe85790/zogegelipadewex.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160832f30e81c9---zijiguvixoroximotux.pdfIn PDF document text
    • http://hifitness.hu/userfiles/file/xagagor.pdfIn PDF document text
    • http://sk-uralstroy.ru/uploads/files/71754434510.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9b0e53137---rajusejezuwusodumoditu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf1222fa51---19580525752.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/ehs9tnmm6593fg26atibeaoegj/49378063795.pdfIn PDF document text
    • http://jinshi66.com/uploadfiles/files/nixiduzisalumavozegij.pdfIn PDF document text
    • https://rosycaffe.com/file/49420922807.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6d63271cc---4256315956.pdfIn PDF document text
    • http://balogmihaly.hu/UserFiles/file/51595508069.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608f48ebef9bb---82257540325.pdfIn PDF document text
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a2cb96e4a---10339183743.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/raduwot.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/38751561609.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/67818235085.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/evaj26v60if1h8f6nvk2fha6v3/xoguzibigigididejizidafaz.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/lepojexubetewerene.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/486def1e33bd2c48e27efc93d7534ca7/negumazeli.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a11f0132140---49864627553.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=john+deere+2410+chisel+plow+parts+manualPDF 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_off0000bf5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF5D 11328 bytes
SHA-256: eff6509667228477ece3b3aea7997b6e159fe7c3909c47c187b6348e7d98ca41
font_01_sfnt_off0000da05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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