Malicious PDF — malware analysis report

Static analysis result for SHA-256 886a536376635984…

MALICIOUS

PDF

87.1 KB Created: 2021-06-26 01:26:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 8a36b0dc3dd67e142367e1c0df71c3ac SHA-1: 322c3dd1fa3847343649462c6691d49164609da4 SHA-256: 886a53637663598435be093af31bd8a4734f79ee6cb74cbac70a6c207407e6a5
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document employs a social-engineering lure, instructing the user to install a browser extension or update to view its content. This is a common tactic to facilitate credential theft or malware installation. The document also contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a phishing or redirection campaign. While no scripts were directly extracted, the nature of the lure and the embedded URLs indicate a malicious intent to compromise the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086a04ce5014---62366713964.pdf In PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/5ac6d6fb1bbbe488c71f515a8afdeee8/xebupadapugopusisedubi.pdfIn PDF document text
    • http://gptools.net/userfiles/file/88920945756.pdfIn PDF document text
    • http://debsluxe.com/clients/1/17/174397649ed9f07baa8f9d9f48c72a4d/File/50412432421.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/0131cb762eded6ff6be7b0b42aac2c7f/mumetofamoduvibetibitafu.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/77750v1drbmeu255i9ue0o45m8/69856063178.pdfIn PDF document text
    • http://goref.ru/files/file/29446920794.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e3a3e52ef8---pifijizavoleso.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/e4hek4do86fl32nio7onc3of6c/42281768159.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/1dbf5850f5dchlc3u2utr5htms/7158210188.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/de26d2d577c3bfe03b4f840605bb97ef/76133813562.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/17279810439.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160749237b4217---bobilosurabagojijalaxa.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/8de21267d808e636e12b31db96649219/24895485421.pdfIn PDF document text
    • http://benhvienlaptop.biz/userfiles/file/31510797403.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/7f76b9549a218eb81313c7eb679f9890/xugunegawudefodazu.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608dce58f376a---jubulixolapewovu.pdfIn PDF document text
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/73cb75dc6d0de7240835d33223f21a0d/70023682893.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b0619327e35---xonedewotutorasozufi.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/xunomuzojedebas.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b55d55e1995---55584635237.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/49832626739.pdfIn PDF document text
    • http://beautifulmoda.com/userfiles/files/54822303054.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=html+css+notes+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f48a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48A 16844 bytes
SHA-256: d902da8d789038414e3c6275e466b6096d9a8f2c772063f34b39c472ea6b02dc
font_01_sfnt_off000120bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000138d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138D4 10420 bytes
SHA-256: b180dbefb22e44c190f899dbc9113d70217843c15262e37c003b8c6135b036d5

Open this report in the interactive analyzer, or submit your own file for analysis.