Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1c6ad941b9410d1…

MALICIOUS

PDF

62.3 KB Created: 2021-06-20 18:21:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: fa2fbf2ffab8966af70e267a42f8e68f SHA-1: 8d7634c4ae2d33b8c88efb3d3893e41699a92c10 SHA-256: b1c6ad941b9410d102fff11973c91924f2613dc6b7b52e88cdcb8ad4e2f45ff0
94 Risk Score

Malware Insights

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

The PDF document contains numerous links, many hosted on compromised WordPress sites, which are likely intended to redirect users to malicious content or downloads. The ML classifier flagged this PDF as malicious, and the presence of link farms on disposable hosting further supports a malicious intent. The document body's reference to 'kissanime watch anime tv apk' suggests a lure for potentially unwanted or malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8016

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://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16094b42cbc887---43523338021.pdf In PDF document text
    • http://circuitvietnamcambodge.com/hinhanh/file/dotazebuv.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/5n2je8d5qai4v3ru1m6j8ps3hs/wanejob.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/1eea5f222c69251bdcad7bccd96bbadb/mirijokunisovowewutegotof.pdfIn PDF document text
    • http://dzbnf.com/upload/file/%5C/48717530251.pdfIn PDF document text
    • http://k-yoga.org/file_upload/spaw_upload/file/20210507023019.pdfIn PDF document text
    • http://hopkins1983.com/clients/861771/File/zelizirogaxuvixivol.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/detifofabuberiw.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/qecpodj0up6q26uhacu3akf88o/66667161090.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/5979f63eeda6e9cd85e6235bf4fac695/37564152794.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/rmafmsg4vg9m0asgf2q43n2e3u/22680632177.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/2045a564c6f55f743b7a48e432aa2db1/retaxeketitefi.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/stklroa6cbgq3o4hf1thirrvhm/31534386987.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/bacf84152e88551a69dfa8340038e210/67788665914.pdfIn PDF document text
    • http://brightwayconsultancyservices.com/userfiles/file/98433023902.pdfIn PDF document text
    • http://evpltravel.com/xv_image/file/70725443348.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf5dcd6fbc0---84846007028.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/830d0665d0f8e56f786cfba06a0190b5/dowigipebilikunux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=kissanime+watch+anime+tv+apkPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D1 4908 bytes
SHA-256: 82ff606dabc945e3acf4451ad4578728b0f2df359675c70dff0d8d3189961497

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