Malicious PDF — malware analysis report

Static analysis result for SHA-256 4258b2254c82d648…

MALICIOUS

PDF

77.6 KB Created: 2021-07-06 06:21:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: df31af6b520da241750f410d31524eb2 SHA-1: 762f12cd6b0713d293e9c089ed2d3eba5fd54d9a SHA-256: 4258b2254c82d648cdd58faa853fdc73276f1e758d3c5336e7314dc46ae78780
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. 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 suspicious score 0.3547

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://allytemp.ru/uplcv?utm_term=how+to+make+it+day+forever+in+minecraft PDF link annotation
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/167ea46795552e38b7f6e44d03c46eb1/vumumari.pdfIn PDF document text
    • https://thefencedocumentary.com/adminfiles/file/49773162049.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdc4d0673d3---dikizapogezilaso.pdfIn PDF document text
    • http://exhibitionchannel.com/upload/sojedagusujumiberinuju.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/kuxorote.pdfIn PDF document text
    • http://hpworld.hu/data/pic/Image/file/kemubofazuzejidotive.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/2d6832a68929774b07217e2aa16fcf9d/22185437617.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160849d070049e---sabumunowuwej.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/a538a04ee4fe972c4a8c5b7a68d3fab2/17143009807.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/vugelagixef.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/vokiriranedalivofetimu.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16070b261964c8---92435842842.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16086c996d6242---jewekoraxufesimapo.pdfIn PDF document text
    • https://sudhirsachdevaclasses.com/ci/userfiles/files/luzeb.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/piwaxadamegivemet.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7c27fa8ced---lokonuwagesadapodoro.pdfIn PDF document text
    • http://shophouse.info/images/files/20933796366.pdfIn PDF document text
    • https://netlandschool.cl/files/gogegujiwefexagatizajepa.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/731ae090e4b7ce105dcf3c64945eba0e/42717696342.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/432ae7ae0291da763638e2de1e6474d7/51788526139.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1f9aad470---53971592992.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16088d51e1aa1b---finobizosep.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b8ff7073c---83321054593.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/1238703195.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b4bc44e03---gadiwivofirisasozumisu.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609c15b54f61b---vetawofupu.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/5158319475.pdfIn PDF document text
    • 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_off0000f16d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001097f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1097F 17460 bytes
SHA-256: 50a90aebd202bf3ad1135a13ff82ed12e046346ee563cbf9da8c0251ebd1ca7b