Malicious PDF — malware analysis report

Static analysis result for SHA-256 01c9be0ee58dbe0f…

MALICIOUS

PDF

83.7 KB Created: 2021-09-01 05:52:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 20f61bded7a98166ea76a005ce55688b SHA-1: 6cdd8e7187da5fa8c1b70e5b98361b43c02f0cd3 SHA-256: 01c9be0ee58dbe0f538a8963f9651ec33dbc37f9361850f6d5347aa62670ff6a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous external links, many pointing to compromised WordPress uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the overall structure indicate an attempt to deliver a malicious payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=transitions+homeless+center PDF link annotation
    • http://richiefamilyreunion.com/clients/7/7d/7d03816b951c94fc7c065ced7c7ccdcd/File/vifesiguvunadexeduted.pdfIn PDF document text
    • https://tumsad.org/img/editor/image/file/11494533845.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/tewozodatonuwotagusugive.pdfIn PDF document text
    • https://haruhonpo.com/upload/haruhonpo/files/musorutijukewuboti.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e7d0eea424f---tuzob.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/a3036565b46566e10eb8d8d76de0d52c/pelubebiwokobokudibusuju.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/24047683876.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7f2ed93fc---vakerijigigafazesig.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/42bc80d3a34a938c93a8f2da4bfaadd1/wawikusabugerevowuvasufet.pdfIn PDF document text
    • http://www.thaitofu.com/image/upload/File/67861523589.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/6815665544.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f2ffb3303---11678062001.pdfIn PDF document text
    • http://francescasciortino.it/userfiles/files/jupamugapar.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/ad5be2477d0c1f963087e45341bc5169/dafixul.pdfIn PDF document text
    • http://a9188.com/upload_files/art_files/files/20210831_181044.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afcdc6c76f2---1716186779.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073e81b168d8---kogutefijixixele.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba368a16f4---45242606499.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab3ff017f6---foxus.pdfIn PDF document text
    • http://nwatchonline.net/userfiles/file/39083376614.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083d25077da9---58736328557.pdfIn PDF document text
    • http://audidalys.lt/ckfinder/userfiles/files/pujiwolifiwamovige.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a2b757233dd3bd6c8e0528819b1d7f43/xigodezegeb.pdfIn PDF document text
    • https://kham.vn/userfiles/file/42408492839.pdfIn PDF document text
    • https://www.uflo.edu.ar/ckfinder/archivos/documentos/9962351404.pdfIn PDF document text
    • http://geoman.cz/data/file/balevov.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off0000e693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE693 16436 bytes
SHA-256: 0f8ddfbf5f41c7ceddb4edc311811497f7b614168bd4861a69908253a95db365
font_01_sfnt_off00011105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11105 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001291c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1291C 10456 bytes
SHA-256: 8d1074a9acf3c9e1a6fbe5718b37a6f7b233c2ce81bb0ea1bb36e29dbdb6d21d