Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bdf28bcea41b147…

MALICIOUS

PDF

524.7 KB Created: 2021-07-27 07:59:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9ab7afeb9eee5a7f9d62596eb109af15 SHA-1: 03f7ec8e2d82e0bc11a6c5f42f9d2ca1a218b27c SHA-256: 0bdf28bcea41b147ad91ee7d7314049f1fb1464cb74c9bc925614a336d201fc1
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan. The presence of multiple links pointing to potentially compromised WordPress upload directories and the 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicate that this document is designed to trick the user into downloading a password-protected archive. The embedded URLs, such as http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b7504dc824---mitopamiwuxisob.pdf, are likely staging points for the malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7559

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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 http://masan315.net/board/imagefile/file/nalarematemedipita.pdf In PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d30f640a55---27292313117.pdfIn PDF document text
    • http://kids-ex.com/89131379362.pdfIn PDF document text
    • https://nazragame.com/calisma2/files/uploads/rivuxivimolemuli.pdfIn PDF document text
    • http://abpaluso.com/upload/file/81969369327.pdfIn PDF document text
    • https://slide-bearing.com/d/files/pevumarokopuranivapo.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b7504dc824---mitopamiwuxisob.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/128c20461d04bfb68a050d79b97a9bc2/80793027087.pdfIn PDF document text
    • http://kojeneckezbozi.eu/userfiles/file/terizitifudugikakomej.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/8a8d1a2971c9fb04340d0359d86d008d/51988996498.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160edfddb1ce41---57404749741.pdfIn PDF document text
    • http://guides2alpes.org/uploads/file/96733849799.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16070ef1fdc5e5---xonokasuwizi.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/bofetabokukapakajexol.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608d7072288f8---86623652629.pdfIn PDF document text
    • https://heritagecambodiatravel.com/userfiles/file/10511758755.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/nevikilogogofon.pdfIn PDF document text
    • http://ducthoaudio.com/upload/files/13142511060.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/be7f5dfdc7ccb3e515b455e0c9c609ad/desavib.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/papexiduzarojonokisi.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c915566186---dudisezesilemawu.pdfIn PDF document text
    • http://webinaris.net/ckfinder/userfiles/publics/files/76975879449.pdfIn PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/44300627057.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854c9f911fd---80156349983.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/vajipumodazuvu.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/16a6dee1e2216e9b1ed8ad1703f39dbc/780427802.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=pon+a+trabajar+el+poder+de+tu+mente+subconsciente+pdf+descargarPDF link annotation
    • 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_off0007bcf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BCF5 11332 bytes
SHA-256: a8cc9f3f25573de74d487d96956369a8b4aebcf4acd86f93ef7554742646d32a
font_01_sfnt_off0007d72f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D72F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0007ef4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF4C 19500 bytes
SHA-256: 3b7c98376ffb3fd6d7e1145f6d009d06f11d47ae154019e76ac95e9c6a1eec1d