Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aeb1d70383d668f…

MALICIOUS

PDF

63.9 KB Created: 2021-06-06 09:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7462fbf2c33adf7022f50334572dcf29 SHA-1: bf1a95e174a78773f4e79e31737bd8a6c13c545f SHA-256: 7aeb1d70383d668fd3a13d44a39949e9a5111ec0565b3ea656c03e008668fddd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm for phishing or malware distribution. The embedded URLs, such as 'https://nomylo.ru/uplcv?utm_term=yamay+smart+hrm+bracelet+user+guide', are likely used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nomylo.ru/uplcv?utm_term=yamay+smart+hrm+bracelet+user+guide PDF link annotation
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160995a3a51bca---jigadosumagij.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bb59f38b7c7---68557066446.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160a9bae7db3ef---7613334090.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/72375498077.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/agobotolumisaze.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609443cbc60f3---nukatemolivobisomenelegas.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/2lrre5c46262p94nhhnnoemj97/xovizokalorifaxaxojow.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/wozozifodofarerawazadu.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/08c607f0ca46ea1c2fbe578eb06bb80b/26631220399.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baaea4f069d---5939364724.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/b6ffb1b33f2a58d11a25daad8178463b/liwusaduwivubufuxakalufad.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f9919a7e93---29556682704.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/57182267323.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE3F 5556 bytes
SHA-256: 392870e75ff40d03e9c29565ef23309628853d38a79657d6bea46931b625e729
font_01_sfnt_off0000d0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0FD 10008 bytes
SHA-256: fc91cd5b9899dbadc6b845c429df67825a90f619b376a6c2d2a54b9256446327

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