Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e0d1f4bc76a2cc7…

MALICIOUS

PDF

75.8 KB Created: 2021-09-04 02:50:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f714d28514878b003a19cfb274f6e6be SHA-1: ae4a55720cf990537048f93ba8b2a1fe87298766 SHA-256: 2e0d1f4bc76a2cc79d406fb429a5d037a232b2168968144d1fbfebd5176aa0e0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links to disposable hosting and compromised CMS uploads, suggesting a phishing or malware distribution scheme. The presence of external URIs and a 'download button' lure further supports this, indicating the document is designed to trick users into downloading malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 7

  • 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.
  • 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://nomylo.ru/uplcv?utm_term=converter+arquivo+pdf+para+excel+gratis+online PDF link annotation
    • https://bhiringisamsankalimandir.org/userfiles/file/dobotosizew.pdfIn PDF document text
    • http://dispensapertutti.com/userfiles/files/sakotawedisepepalikevu.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/25jbrmmimbh6vq7v8fsqh19k5t/74994737678.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/bokufilivipuwowe.pdfIn PDF document text
    • http://kzlo.pl/fotki/fotki/file/54925302888.pdfIn PDF document text
    • https://spacio.hk/attachment/file/2957807131.pdfIn PDF document text
    • http://fashionflutters.com/ckfinder/userfiles/files/fobegidulovazoxafojaf.pdfIn PDF document text
    • http://ledson.ru/upload_picture/60598331774.pdfIn PDF document text
    • https://sanaspinler.com/calisma2/files/uploads/60845454263.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/78393116412.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1611876be924f4---voresetojolegokejog.pdfIn PDF document text
    • http://fecirturizm.com/resimler/files/jukudigesuxebi.pdfIn PDF document text
    • http://ychnjl.net/userfiles/files/pepepikovulenutini.pdfIn PDF document text
    • http://liyangah.com/Upload/file/jawivafavemigowa.pdfIn PDF document text
    • http://rotang.net/userfiles/file/30036805411.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/bd6bcb34693d6d0b23ccacfcea193954/femeponama.pdfIn PDF document text
    • https://ivanamihic.com//files/20216251863.pdfIn PDF document text
    • http://scard.vn/app/webroot/uploads/files/bofotaxasipuxanabunivak.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/vimoriso.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/05vv18408mg9b3g7i2o3ql7764/77405731229.pdfIn PDF document text
    • http://finpacecuador.com/userfiles/file/jakizetupuwa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1A9 11240 bytes
SHA-256: a1276db0a01531939269c6bced223a23eb10ba3b0ebb0e76608ea27fdc263840
font_01_sfnt_off0000dbb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f3c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C4 17828 bytes
SHA-256: 20a8994a0c7984c0a407ccb64f24823a959e6f00c3bfee6f04e341d227ddc4d0