Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b0d89034b3a62e6…

MALICIOUS

PDF

104.9 KB Created: 2021-07-06 22:23:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 2357ee5b6cf765b482ee215dafbb7012 SHA-1: 97eec1640761fe5539eda1a9740ad127b23bc602 SHA-256: 2b0d89034b3a62e6de332e21013a2b547d33fed20f6758c05f2d6bd7d02fa333
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. The document also features a large number of external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a phishing or malware distribution attempt. ClamAV detection and ML classification further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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.
  • 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 http://msnladyboy.com/ckfinder/userfiles/files/8863964991.pdf In PDF document text
    • https://restavracia02.com/userfiles/file/didufokazixuwedo.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca9e96fe96---49226925418.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/pelobazi.pdfIn PDF document text
    • http://donkaew-furniture.com/ckfinder/userfiles/files/47135292105.pdfIn PDF document text
    • https://thedestinbeachhouses.com/wp-content/plugins/super-forms/uploads/php/files/f0617a1180c5cab54bd72dd7863cd233/sovawekalurajanelutaja.pdfIn PDF document text
    • http://pechati-piter.ru/userfiles/file/73287547523.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/7d8733e4f76feff083fb30b62d9e42a4/43981209122.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/534125ebd56723ccc268f18ebcd153bb/50791496690.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/ziwideridiwuvatuwalodomeb.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/2b0cddf657481dbb5e663175310a034b/40700250649.pdfIn PDF document text
    • http://zulassung4you.de/bilder/file/novilomadarofex.pdfIn PDF document text
    • http://whalesart.com/uploadfile/file///2021062317312655.pdfIn PDF document text
    • https://damsindia.org/admin/uploads/file/dozuvin.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bffd3c81063---fozasifizadugotudobojuj.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/bevawe.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/3b3a67acca26eb068f9ed2bdbcf921d0/sokukup.pdfIn PDF document text
    • http://inimtrento.it/userfiles/files/12387354750.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/464a90137bbe759578d5f50794ced25a/47607188341.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c0b78144c---zupejepekoredok.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/vsk69bjdc4ihvffnc9458rblar/56084805607.pdfIn PDF document text
    • http://lakes77.com/clients/47041/File/sevujobatuk.pdfIn PDF document text
    • http://paintmaster.hu/js/ckfinder/userfiles/files/35831353187.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4d6cc283b---36573356363.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=king+magician+loverPDF 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_off000136d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136D0 10364 bytes
SHA-256: 628ef14159567cff61009e188e2b80252441401dec1f3c206cb93b5a8a9f0307
font_01_sfnt_off00014e28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E28 17908 bytes
SHA-256: 5177002775ac786bdf623862d98052cfaf14de0d6d7fb0e31ac2a80be6801159
font_02_sfnt_off00017ce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1