Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd567b4483827351…

MALICIOUS

PDF

77.5 KB Created: 2021-07-22 02:10:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 229b5aa0c1626f49e11c60aca920f7f5 SHA-1: 98498e82c41f6200ae99956aa549e353bd15cec3 SHA-256: bd567b4483827351f26d72d36d0111647c87dbdf32cff1698b79c18203cb7ddb
124 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple websites, many of which are hosted on compromised WordPress installations. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The primary attack pattern involves luring users to these external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4146

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 https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/205131d822139f462ed2f2e44f656328/9245153961.pdf In PDF document text
    • http://maristaslardero.es/userfiles/file/96693493864.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/3b97164e9c6fa9ee6dc5f6cc123658bb/zoposixa.pdfIn PDF document text
    • https://songhong-thudo.com/img/files/4891999898.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/5b20682d450b54258d8a7507e47f442d/83327089491.pdfIn PDF document text
    • http://brooklinehs1964.com/clients/6/6a/6a3559cec3eb17f551da2d864c8c85ab/File/49818396056.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097170d6e755---wovevokaw.pdfIn PDF document text
    • http://wwpokebar.com/uploads/files/56682787393.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/icem3fe9gc8vutbe54o5jtg360/81754078815.pdfIn PDF document text
    • http://gchsclassof1970reunion.com/clients/6/6a/6a45fbe13d63dbb0eb8070d7cb9dbc89/File/43537111469.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/jm09j5ucrudb5m0ehdtibbr3d1/89870806126.pdfIn PDF document text
    • http://bakoca.hu/files/file/vepixe.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/017ef1faae9cad1982e0f30744f43107/43793718176.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/bojubirageriw.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210717171039_1358324418.pdfIn PDF document text
    • https://bk.knu.ac.kr/ckfinder/userfiles/files/34522172123.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160abb0c665294---25735503491.pdfIn PDF document text
    • http://kurier48.pl/files/userfiles/file/49607982315.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/4nnv7vtbo35i81c6ulbni6vj52/nogabasagemudolatikewotat.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/3c81f47381d0778cfcc3a0f69d1c238f/tizaju.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccd7475d1c---19195628241.pdfIn PDF document text
    • http://yourhealthyanswer.com/ckfinder/userfiles/files/wasuwubev.pdfIn PDF document text
    • http://spearsyounglegacy.com/clients/b/b2/b2c23f164518415ec8f3c1c8d0af542d/File/jozulimuzizaxipuf.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/c5d0125c419504d16915aa5d702a2e3e/61173770982.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=you+are+my+strength+by+maranda+curtisPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dafa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAFA 11108 bytes
SHA-256: a998e860760f86d451e9bfe4488e2ec73b908695847c56c2dd09db19cefdef0f
font_01_sfnt_off0000f48e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48E 17236 bytes
SHA-256: 2f7ff6caf0401b2f3247c9f6fe160a5db1677b6bb37d955cc4f2f070af824a61
font_02_sfnt_off00012137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12137 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1