Malicious PDF — malware analysis report

Static analysis result for SHA-256 a363f184e65ead48…

MALICIOUS

PDF

96.6 KB Created: 2021-09-21 00:54:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 76cc9a23c32e1d44432891eda52f1c5c SHA-1: 34d2d6f2b55b50934d9fb2a7c252ed2f450091e2 SHA-256: a363f184e65ead48126943f8737b73a05e3cfc6f8dcc24e9e6677ae6eeffa2ad
172 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of a 'download button' heuristic further supports a phishing or malware distribution lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9890

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://crysiq.ru/uplcv?utm_term=shadow+fight+hack+apk PDF link annotation
    • https://adamslakeband.org/userfiles/file/xodinelabi.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/ps383j1go1cgsbu34kll2bjeb7/88894634166.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/0f40b521286a7bf6b8943e8de1e56dfa/gupoxumunajomexovero.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/pumojabinaxojibowatusizos.pdfIn PDF document text
    • https://tipresentoio.it/images/file/98788874458.pdfIn PDF document text
    • http://kowalstwwo.pl/public/cms/images/file/64561919629.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/446b726c1c07d03635e90006b79dd417/1968531717.pdfIn PDF document text
    • http://www.ville-civaux.fr/admin/js/ckfinder/userfiles/files/15419135813.pdfIn PDF document text
    • http://maketmaster.ru/admin/ckfinder/userfiles/files/15760730393.pdfIn PDF document text
    • http://pelesiuvalymas.lt/i/File/36389526798.pdfIn PDF document text
    • https://copacndg.com/images/uploads/files/79215198062.pdfIn PDF document text
    • http://narnivet.com/userfiles/files/tipapos.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/44257479926.pdfIn PDF document text
    • http://lamorenj.com/userfiles/files/jofosawekiletineve.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc5128498f---nedumedo.pdfIn PDF document text
    • https://7foro.exceltur.org/exceltur_nuevo/ckfinder/userfiles/files/dazofow.pdfIn PDF document text
    • https://ymvii.com/admin/upload/files/gojabedutipa.pdfIn PDF document text
    • http://rdasesores.gestconcursal.com/editor/ckfinder/userfiles/files/futelonuzitogovikuwojixev.pdfIn PDF document text
    • http://whuntex.ru/userfiles/file/zigupomudoreru.pdfIn PDF document text
    • http://elcwma.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/55899386820.pdfIn PDF document text
    • https://designclarf.it/file/darulisivo.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1614900e9b6261---71220000360.pdfIn PDF document text
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/wanituvu.pdfIn PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/jimagijibunusalaf.pdfIn PDF document text
    • https://ataru.site/js/ckfinder/userfiles/files/6690352159.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e78a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78A 23592 bytes
SHA-256: aa7ec840eff32a32c0f0c0b26febdabd8fd7e8130f0b99c18b4dbfeb9fd82064
font_01_sfnt_off000123d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123D8 1680 bytes
SHA-256: 6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc
font_02_sfnt_off00012bd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BD5 10600 bytes
SHA-256: 4e4e2281cc1f549a88b71f3dc447444fd42ab3af5e5795061eca3eec20bb10bd
font_03_sfnt_off00014417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14417 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off00015c28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C28 16544 bytes
SHA-256: a9d0f8fda1eaa6cfcd9743f51aad1dcb114e010191cdbdb1926d5a4f30a96b08

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