Malicious PDF — malware analysis report

Static analysis result for SHA-256 01174142718ad48b…

MALICIOUS

PDF

84.9 KB Created: 2021-08-17 06:34:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f6e8b6413caf156086df8cbf48753e99 SHA-1: 6277fe879cbf041f33ac79e32d3c56646ab636d2 SHA-256: 01174142718ad48b3c70ef3f568648a61ca0cf9fd3920e72dbead16678cd8bc9
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to distribute malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a 'download button' lure further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://alakharia.com/public_html/userfiles/file/zimunonoma.pdf In PDF document text
    • https://francoisdaulte.com/ckfinder/userfiles/files/99576313554.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/6f9a98f469ab53f86a19f8dba9a7e329/88503674210.pdfIn PDF document text
    • https://knoxvilleremembers.com/media/71237650797.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a6c07a74f---89119360425.pdfIn PDF document text
    • http://canhtoanland.com/upload/files/wirumow.pdfIn PDF document text
    • http://charmingcurls.se/upload/file/85630955861.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/0n5ukbkkpi8hkah8b21c4sv5cf/71814167861.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/30656078906.pdfIn macro / runtime command snippet
    • https://bjjewels.net/nbloom/fckuploads/file/wesujokezol.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b296ecb7c---tumewodoxogodagupubuk.pdfIn PDF document text
    • http://eksan-ltd.com/userfiles/file/dazonoparosu.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad2c4c0c024---tejeju.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/vdsp6dfkkn03jmm43ne6tekkoi/66067139676.pdfIn PDF document text
    • http://speakingaboutnetworking.com/ckfinder/userfiles/files/6875462965.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/nctnv3lapbt3isg4mh8mb93570/fedudomojemomupepuwoxu.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160759e1ee70bd---nupaduxog.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160afe155f1521---fovusagaseberadezuzizo.pdfIn PDF document text
    • https://autoprofi.ua/userfiles/file/sanowelibeladusin.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160734655581eb---nipesaferesusobepamaradid.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/48747977926.pdfIn PDF document text
    • https://tailormade-sales-marketing.com/userfiles/file/52805592830.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a67d29e79b3---sosujawurolobegefitivus.pdfIn PDF document text
    • http://short-story.ru/upload/file/54220439538.pdfIn PDF document text
    • http://ekstelekom.com/userfiles/file/65179158398.pdfIn PDF document text
    • https://wcdt.co.th/wp-cIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=fast+and+furious+turbo+charged+prelude+full+movie+download+in+hindiPDF 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_off0000e729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE729 16868 bytes
SHA-256: 0f26b92b081b0f6f6ce0656546d48cb856019842258afb8eb35af5bbfb6cfa72
font_01_sfnt_off00011272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11272 11436 bytes
SHA-256: d8e27c01a6be71c7eaa686eebe1a4452f2e4a9ae7c1854aa504b658677298ef7
font_02_sfnt_off00012ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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