Malicious PDF — malware analysis report

Static analysis result for SHA-256 89d427654e5f453d…

MALICIOUS

PDF

68.8 KB Created: 2021-06-08 21:15:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ede4665349496c258bbec2a33a39cb3e SHA-1: f8063c5b957d7f4542b78945245d1bc313ec36f0 SHA-256: 89d427654e5f453d94eb4721862d83074efcc7055c8ba8ea0c6cecb2118cad2f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document exhibits characteristics of a phishing lure, specifically using a link farm to direct users to download files. The presence of multiple URLs pointing to compromised WordPress uploads and disposable hosting, combined with the 'Dj Khaled grateful zip download' lure in the document body, strongly suggests a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8336

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://krisoc.ru/uplcv?utm_term=dj+khaled+grateful+zip+download PDF link annotation
    • https://service-panev.com/userfiles/11648129403.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/7d81d0eab31782312cc18d0942a91d56/61527986808.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160793a49635b8---29609812794.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d68129604---xinawurisobitunupok.pdfIn PDF document text
    • http://permanentnimakeup-brno.cz/userfiles/files/defefu.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a451f66b142---10070026716.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160739740c438f---40985428011.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/180b7ef1377baca076f91fe21b9adf60/72067932581.pdfIn PDF document text
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/23283552105.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/fuvunizij.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/totajeku.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a709fd5cf7a---kafebifabibupa.pdfIn PDF document text
    • http://kartywspomnien.pl/uploads/assets/file/pazaridefaviluj.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/cr84sn3jcb5ikt2qj54c9nohet/salotanoze.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/239e480c2a8772ed2196e83ada35f306/dirunawosewudiw.pdfIn PDF document text
    • http://airholic.com/UpFiles/WebEditorFiles/file/25873679346.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/9a46c0a37db7d03b5b0fb379ebce6e84/16772056127.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA6 5408 bytes
SHA-256: 0c4fe00b3f0758ff79bd9dc20f4a41cb1f22b36632e728cb6dad9efc735e4568

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