Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7265f0cf8d94b7d…

MALICIOUS

PDF

90.6 KB Created: 2021-08-06 00:31:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1807e24691d55f145b50acb54d46855e SHA-1: 4d13aebc227323db78b1408504fee5cfdd9ff922 SHA-256: b7265f0cf8d94b7d33f2cd486c6dc93e4212bf76cce7a6f358240b21ca51afaf
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-severity PDF_RANDOM_URL_LINK and ML_NYX_PDF_MALICIOUS. The file contains numerous links to external URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting an attempt to redirect users to malicious content. The ClamAV detection further confirms its malicious nature, identifying it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/186e7cbf713f93c49e39b3dc82bbb1b5/80197980402.pdf In PDF document text
    • http://ambulatorioveterinariobubiniregini.eu/userfiles/files/52361424428.pdfIn PDF document text
    • http://servis-hradec.cz/files/file/63976286520.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/c1ca5f1f4834529ab0d5f077b9094063/10003222490.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/f3cfb7c28db2c16b8476085eba5ac3ff/vojefapodep.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16086eba6c99b9---rivibodebokipod.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160be441006625---wiruparonozejivulepiru.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c3d2a5648f8---gotiguf.pdfIn PDF document text
    • http://ledspectrumthai.com/ckfinder/userfiles/files/64126354026.pdfIn PDF document text
    • http://phannhan.vn/files/usersfiles/files/5751470125.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/8402953785f3d1983657756bd60d07a6/popalonogozebisiwun.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/jaberoxufesow.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160839aa8a1e94---87213362330.pdfIn PDF document text
    • http://standdominica.org/files/files/39407162886.pdfIn PDF document text
    • http://cnex.cc/images/blog//file/51163062824.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/69e777dba9c5c3bc7d76baf1f609f28b/17043877313.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c28da0c6971---giwikidul.pdfIn PDF document text
    • http://dorapeyzaj.com/userfiles/file/jenaxokokuwede.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/2oh2kt75idmpkeldrja3liuoj0/gabezevifigozuxinile.pdfIn PDF document text
    • https://picinterior.com/ckfinder/userfiles/files/zodapewovakej.pdfIn PDF document text
    • https://west-holding.com/userfiles/file/sagugojizubitaxun.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/0ibemos18l93ivbjmtt3fnjdlc/nesukagevaka.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/5707e6294be044206484b26b90942d46/71547997461.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160988e06f22a8---3392498598.pdfIn PDF document text
    • http://ozona.pt/wysiwygfiles/file/8109558572.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/bfa297d5ad2d62aa83cdea72a2521019/kajinumam.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/zevuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=descargar+imagen+iso+de+windows+7+starter+64+bits+gratisPDF 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_off0000f68b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68B 20144 bytes
SHA-256: 0811e1de5d47b1269bf5b98558ba521f17357189da61cc041b83653b98ba4b5d
font_01_sfnt_off000129a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A7 11192 bytes
SHA-256: 07eb4c28bbcee051e4ac7daa7b7078a1f33b35bc7976dbf05c6fafe2a5c81518
font_02_sfnt_off000143d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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