Malicious PDF — malware analysis report

Static analysis result for SHA-256 e28e763ac6e2368b…

MALICIOUS

PDF

78.1 KB Created: 2021-09-08 07:02:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4b676dd61533193ca8a03f2e779ac0e2 SHA-1: e8774a9d5cc50cb75d2087af1e37f7201d17f2a8 SHA-256: e28e763ac6e2368b415dde678d1075871daa8c9ff9ad64394c99629b16f21072
154 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of numerous external URIs and the nature of the hosting indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7162

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://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/ijs0q511clare4uq7obc2b8984/kutixakikezuwalez.pdf In PDF document text
    • http://artecgroupservices.com/imagenes/file/8975893881.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/37645586100.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/16099abc65fed4---22194910699.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16130a60d77a40---88961394584.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/14610517267.pdfIn PDF document text
    • https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081597dbd797---53186448150.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160851f4c0107a---guruvidasiba.pdfIn PDF document text
    • https://postelezmasivu-praha.cz/ckfinder/userfiles/files/13607663042.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/84575856676.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/tm4i40434i3goqs4ud5qcq8g9k/lujulomul.pdfIn PDF document text
    • https://4cmedica.com/ficheiros_upload/file/jotulalezuronoxade.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/chqv7gbfompehqrrhr3mvj95l3/diramoxuwujadijuj.pdfIn PDF document text
    • http://constantcontinuity.com/membership/data//files/meberojew.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3739236fa---nifenunifuduputa.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a060a79a47f---22827981450.pdfIn PDF document text
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607451bbd5fc8---50836509147.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d636caf0e94---novetuxukagozuxopakega.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607007c57d765---potozodosexinorelis.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612b4d0db7b4f---18554595052.pdfIn PDF document text
    • http://studiopetrilli.it/userfiles/files/lilanuzaguxotezubibit.pdfIn PDF document text
    • https://maconlux.ovh/userfiles/files/xozerorivojokino.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a136570b09---56319673591.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/nej921ph45i7ulm8ld4qnmk1m1/93767393921.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/k0145a60om18d0dki3nrs2ahhn/wewima.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=repertory+book+pdfPDF 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_off0000e143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE143 17732 bytes
SHA-256: 0b970ebeb4acbf85a125b912b60009715dc2dd87b0160163392f0c70b0947e0f
font_01_sfnt_off00010fa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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