Malicious PDF — malware analysis report

Static analysis result for SHA-256 4beed46201c39853…

MALICIOUS

PDF

69.7 KB Created: 2021-08-28 05:57:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 368c7bc4fab35fafaef33a6bd2967264 SHA-1: 2a8a8f15ba3e0ba81233cd524e5432baec666942 SHA-256: 4beed46201c39853bc7f742a1f19c2428a5feec01c9d52dcfc69bbbc39756aa2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that point to external resources, some hosted on compromised CMS platforms or disposable domains. The presence of these links suggests the document is designed to redirect users to potentially harmful sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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 http://weifong.tw/fckimages/file/24689515073.pdf In PDF document text
    • https://corpusbg.com/files/fck/file/11278864432.pdfIn PDF document text
    • http://martonelektro.hu/files/file/34061343473.pdfIn PDF document text
    • https://xn--hjrnskadeakademien-mtb.se/userfiles/file/fonux.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/eed8251015a1f0e073737af2c6863c8f/lagutuzomubokakolezi.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b5cb0442741---zilakoguliwev.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714aed735cc---87374746094.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/5270fa91d15369b3f602e1df296448aa/83163269516.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b4f92f72f18---29048482370.pdfIn PDF document text
    • http://kbchina.de/upload/fasilefojapamonota.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/boseteselezunakojaxi.pdfIn PDF document text
    • http://electrogalicia.com/electrogalicia/recursos/archivos/bilubiduni.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160babc4d5d51f---didelupenulabezofuvuse.pdfIn PDF document text
    • http://ptaki.info/imgekoprojekty/files/56108868710.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1a4050f25---11500364163.pdfIn PDF document text
    • https://bandotrading.it/uploads/file/vikoriwapevekaban.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160778d475a9ce---pukonokakezuf.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/655751617f1bfefe0e03a342bd15a7f3/4400496216.pdfIn PDF document text
    • https://lecachet.fr/docs/files/wimix.pdfIn PDF document text
    • http://jar-ted.pl/file/27369545916.pdfIn PDF document text
    • http://home-hj.com/up_photo/file/xeguvogusigobiruw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=chrome+taking+up+memoryPDF 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_off0000b2b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2B9 15044 bytes
SHA-256: 18481900c6a70ed76a43d5b074af9c7b12dc0ea0e09f68f143bd01408b1a7f92
font_01_sfnt_off0000d8aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8AA 10820 bytes
SHA-256: c966006eaf045cd2b85531b7eeca6ffd27defd5a5130cf5537476adaf0522b7a
font_02_sfnt_off0000f182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF182 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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