Malicious PDF — malware analysis report

Static analysis result for SHA-256 dafcc372f9f61a18…

MALICIOUS

PDF

98.3 KB Created: 2021-07-21 17:59:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6478e63a9d40ecccebf9ef10f9660c43 SHA-1: 6e5901e67d9e19b243d214e0e1b7770235dcfa22 SHA-256: dafcc372f9f61a18f99b1a86dc245e3ed27530bd2e1e7ea1096275f2eb0bfd95
124 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. Static analysis reveals it functions as a link farm, containing numerous URLs pointing to compromised WordPress uploads and other disposable hosting sites. This pattern suggests an attempt to lure users to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4108

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://orbitsecurity.qa/pro_mvp_tech/uploads/file/47031934008.pdf In PDF document text
    • https://tonwen.org/userfiles/file/jimerigaxari.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9dd0b7362---70400362009.pdfIn PDF document text
    • http://ydtmuhendislik.com/ckfinder/userfiles/files/liliwi.pdfIn PDF document text
    • http://janandpoos.com/clients/872640/File/27056986084.pdfIn PDF document text
    • http://joewhitefamilysite.com/clients/59967/File/xateranonexexo.pdfIn PDF document text
    • https://machnhaduong.com/images/uploads/files/5577628582.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d08645c93---siminavugososabalurawiti.pdfIn PDF document text
    • https://evergreencans.com/userfiles/file/ditawi.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160852c2e8eb75---vuguwozalunufuge.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/35277168970.pdfIn PDF document text
    • http://ahchala.com/img/file/kikuwaruxowixipopi.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2b22694da---penuweditasuxiboxoki.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/16071dbe7c3a41---mipewojefaf.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160838b3b50f15---74948702223.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/4042600900.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/51h5465iu31mbrd1cvv7js36o3/momipugetivamis.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/d990475d42e28a360de75a0e26cfdd5f/fuzone.pdfIn PDF document text
    • https://triosms.com/userfiles/file/dopugelelajomusufipotin.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/79211818477.pdfIn PDF document text
    • http://ciskmv.com/css/file/13611133962.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/0m7hov33l0t0m4kdp7tune706u/57763355875.pdfIn PDF document text
    • http://ehs1958.org/clients/73155/File/71629625577.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abd594735a1---bijisigizoput.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=gre+and+toeflPDF 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_off0001356c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1356C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014d83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D83 10128 bytes
SHA-256: 4cba25d14833e876f5b77acef4a43fa6da56d4e5c9bdb813c61bf66816edf4cd