Malicious PDF — malware analysis report

Static analysis result for SHA-256 d43a552f2f1a1574…

MALICIOUS

PDF

87.8 KB Created: 2021-07-10 06:03:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 060090ec0420d3b71617cd84e52d3232 SHA-1: 6d96e0383ffa871f6cf24eeb6fe7bdd7ede1f960 SHA-256: d43a552f2f1a1574e59c4dbff00f90202ba310636acc1305cd73f9885fb8850d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites, many of which appear to be WordPress installations using the FormCraft plugin for file uploads. The presence of these links suggests the PDF is part of a phishing campaign or a distribution mechanism for further malware. No scripts were extracted, but the overall structure and URL targets point to a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://crysiq.ru/uplcv?utm_term=dragon+quest+xi+level+guide PDF link annotation
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d468b04e251---35798167352.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf01f4fb11---repofesuwafazoga.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/77378444267.pdfIn PDF document text
    • https://heritagecambodiatravel.com/userfiles/file/6959456950.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16078156b2df80---60827885137.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e81f1d755dc---fasakudazukutuv.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/kijezixuwimijomugijozemen.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/1b08873f403bffbbd8e0456a40459ab1/robegulusilexewogak.pdfIn PDF document text
    • http://dwhs79.com/clients/15834/File/93168536918.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160a41df896cc0---fipunodubok.pdfIn PDF document text
    • https://ezastupitelstvo.sk/editor_uploads/system/files/vulupajoperavexawejusokep.pdfIn PDF document text
    • http://csc0512.com/userfiles/file/20210624104923_xksguv.pdfIn PDF document text
    • https://sanxuattrucauthangkinh.com/Images_upload/files/likajuwodovezuxoperedim.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/fizutodowaralosifiwur.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/2edf394700f3ba415bbfe4c0f9ec4ace/dofiw.pdfIn PDF document text
    • https://ekransamara.ru/files/21650978784.pdfIn PDF document text
    • http://farmaciafasolis.eu/userfiles/files/jiditijaxixisipevoke.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/82476858092.pdfIn PDF document text
    • http://generale-bureautique.fr/gdb/files/file/biburapedi.pdfIn PDF document text
    • http://thanhtindesign.vn/uploads/image/files/69900249811.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160827468c81aa---pixozuledesanewujetebeb.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3b3162b813---63566455744.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/c0e69d423ae2c019bf5d3d52119b7150/wozexide.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/g6sj36ut7pcfip7ilqjbi9ibgl/semedepa.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_off0000f5d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D1 10840 bytes
SHA-256: 6a98d1ccecbdc3e9158a435b23559e7149e879267353239852caffe8bf8d9c33
font_01_sfnt_off00010e78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E78 16736 bytes
SHA-256: 2b57057651a5d0cf9e824487737b5d4bd4e56b54893ee96cdddff0261e0abb90
font_02_sfnt_off00013a19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A19 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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