Malicious PDF — malware analysis report

Static analysis result for SHA-256 24e4fe8752235ef1…

MALICIOUS

PDF

68.8 KB Created: 2021-10-01 00:10:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: e64ddb845675e20a511efa9bb55f56bb SHA-1: 6d3cced4c5038984882efbad879814c8899c60e7 SHA-256: 24e4fe8752235ef19e7abda8de16a55b102962494973f70dd45b3a9fac2064f3
184 Risk Score

Malware Insights

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

This PDF document contains embedded JavaScript and is identified as a phishing lure. The heuristics indicate it's an image-only document designed to trick users into clicking a link, likely to download a second-stage payload or redirect to a phishing site. The embedded JavaScript and numerous external URLs suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • 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://crewmak.ru/uplcv?utm_term=sen+cal+kapimi+1+english+subtitles PDF link annotation
    • http://peak-experience-japan.fr/images/blog/file/94846887780.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/vilomuzesixususadi.pdfIn PDF document text
    • https://noglehoma.com/ckeditor/files/files/mupezadaxi.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/04886c10b3f662100c4420589c9edec7/34222542175.pdfIn PDF document text
    • http://mijinmotor.com/fckeditor/userfiles/file/xigasobemasazovegewel.pdfIn PDF document text
    • http://viacaosaopedro.com/www/js/ckfinder/userfiles/files/rekirejuvepojenujaju.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16135163047724---53005667433.pdfIn PDF document text
    • http://labotinnghia.com/img/files/65427074864.pdfIn PDF document text
    • http://friulanapanini.com/images/file/somimafozabuzunok.pdfIn PDF document text
    • http://mmprogetti.it/userfiles/files/66964916604.pdfIn PDF document text
    • http://edwindijk.nl/home/edijk/domains/edwindijk.nl/public_html/uploads/file/83628772666.pdfIn PDF document text
    • https://cristalparkhotel.com/ckfinder/userfiles/files/41358797654.pdfIn PDF document text
    • https://parisnordmedical.fr/docs/file/witugeguwovunijevixibavab.pdfIn PDF document text
    • https://4cmedica.com/ficheiros_upload/file/95651648478.pdfIn PDF document text
    • https://ietc-oman.com/userfiles/files/41285068226.pdfIn PDF document text
    • https://capitalsyndic.com/userfiles/file/jewodarofutov.pdfIn PDF document text
    • http://ziconiavip.com/uploadfck/file/14134036266.pdfIn PDF document text
    • http://yogaschoolofkerala.com/photos/editor/files/rilup.pdfIn PDF document text
    • https://butterfly-propertymanagement.com/userfiles/file/lusigegizu.pdfIn PDF document text
    • http://ahzycw.com/upload_fck/file/2021-9-18/20210918230655825875.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b95f54b4d3---97662896206.pdfIn PDF document text
    • http://nut-shell.net/upload/files/43593896536.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_off0000b055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB055 11060 bytes
SHA-256: ec97d7cdf897bfdf998bf269ea5d784618464223189adca308df6b9ff3dc97f6
font_01_sfnt_off0000c9b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B3 14320 bytes
SHA-256: 6b4d8a438346c7d8aafdf311435a6c9745895eb9acf3336783b65453b4101554
font_02_sfnt_off0000ed76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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