Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2751286b6174854…

MALICIOUS

PDF

82.2 KB Created: 2021-07-06 00:10:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 7da3dfee88b3e6c316b0a88ca6bd88c8 SHA-1: 2e6abf9f46f85f7d5acb55a71fc3913a13959fa2 SHA-256: d2751286b617485421e60d44cd0e8aa450eb3e1b03eae8dae83c275e6dced227
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm with numerous URLs pointing to PDF files, many hosted on compromised WordPress sites or disposable domains. The primary function appears to be directing users to external malicious content, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • 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
  • 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://elesud.it/img_pagine/file/zevoli.pdf In PDF document text
    • http://designbeginnings.com/upload/file/vosetavagesadodivobu.pdfIn PDF document text
    • https://yuss.it/file/vuzekanoramajajapexututa.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160ccc4315d320---92744621422.pdfIn PDF document text
    • http://latework.cz/soubory/lulezixutikaxivotegan.pdfIn PDF document text
    • https://jamurgoreng.net/contents//files/49066834591.pdfIn PDF document text
    • http://ipost.mn/ckfinder/userfiles/files/wakamadefipejekojugexaju.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/xuneridepudimo.pdfIn PDF document text
    • http://morard-mcf.fr/data/Files/13614304173.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/fd6bf1b37a1f43ad21bf911b4899eec5/29069257699.pdfIn PDF document text
    • http://podushka.by/files/files/talatawitoxada.pdfIn PDF document text
    • https://global-brand.net/userfiles/files/wuzoguwoxalekotujivuxa.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a55730808e---lifirexomoved.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/sutibuvegazusenoja.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/1fdc959386bcc2bad08df64acf6b240c/17171226317.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/duwute.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/hbjdh2j9p4q7d7aju3e8mn0tlo/nufulawukomakezef.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a1636dc92aa---81935507034.pdfIn PDF document text
    • http://networkinglikepro.com/ckfinder/userfiles/files/92495354457.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5552498979---75302624119.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/b17aa8e30d4f8e76308eb2f2f006fce4/75693765565.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/29e9e1cecb90bbfc2070295a4b640a38/toramatefonobukoruses.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=how+to+get+messages+after+unblocking+someonePDF 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_off0000dd0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0F 11088 bytes
SHA-256: e8ff5b4dd4274faa9a6264e0797226756521bbf117bfc801cf33b5438ec51bc6
font_01_sfnt_off0000f6ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EF 17140 bytes
SHA-256: 4506a22bb22d4b92910b149056ef5651aa645d6827166628ec9aff6c57863190
font_02_sfnt_off00012372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12372 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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