Malicious PDF — malware analysis report

Static analysis result for SHA-256 84878f0116652eef…

MALICIOUS

PDF

124.9 KB Created: 2021-08-05 09:45:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 30b24cfb4bcfeb2191eb39ba5e85a5ca SHA-1: 3111db4a5c8ae389ef18044014f4511ce0096f23 SHA-256: 84878f0116652eefad03f3e1bbe7cc673c81f77db65c2bfe1ad3e5b0c43c24c5
94 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS uploads, suggesting a link farm designed to distribute malicious files. The ML classifier also flagged this PDF as malicious with high confidence. The document body was unreadable, preventing a more detailed analysis of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9468

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://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/3bd01c2815a50878455c11329a894430/517211118.pdf In PDF document text
    • http://judyzscotties.com/clients/1/1f/1f1ef5c9f72ce0e5bea5babf356718c6/File/besegowidelakuxolaki.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/kokepar.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/1291dc6a5fa376ad80d4c06c82ade28e/mizibojel.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeb6d051a53---walekun.pdfIn PDF document text
    • http://gndpta.eu/news_objects/files/81159031532.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607898c425126---zatojavijijofe.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/99469350300.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/gemq55rdjmp04e1kc27cks48gj/zefovaruwajomenop.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/ovhuibr23nogcgk3js5s9gdrcr/temikivexesedok.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/71dffa8af5b5fcee87a7550f3f67af81/53114111906.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc8af5a2983---67157667598.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071cb36c2da3---lepugi.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/rajepajosa.pdfIn PDF document text
    • http://karmand24.ir/basefile/ehotel724ir/files/63971215147.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160885fdc37603---4053120331.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/gorak.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160905bf4084dc---jowarobalimekulaf.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/b924fedfc537a2370915fb21fea28630/85714018153.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e17d22d21df---29829976246.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160971c8496853---zamaxu.pdfIn PDF document text
    • http://digitalqwerty.com/ckfinder/userfiles/files/44720599735.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/58ihdffoii9uhnmb4a2nk9in27/23253486027.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=baixar+livro+mercado+financeiro+produtos+e+servi%C3%A7os+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001dada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DADA 11300 bytes
SHA-256: 159043b85c425f6ee259dd3e3a033a41006e5eff330a3aacd472f7c55ce21aae

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