Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cc075938e75b8fd…

MALICIOUS

PDF

84.2 KB Created: 2021-09-16 13:06:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3cd53b5f17a81d74ca878b7307efcd1f SHA-1: 2b90b3ca02add90f809a0e6d054318d599de0c95 SHA-256: 4cc075938e75b8fdaf7fe202e8a10513eac69182cfd2a9f44bfd640a9bcd3eba
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded JavaScript further supports malicious intent, likely for obfuscation or to facilitate redirection. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • 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://irlanc.ru/uplcv?utm_term=warhammer+40k+indomitus+pdf PDF link annotation
    • http://targhevaticane.it/userfiles/files/87480649122.pdfIn PDF document text
    • https://badoza.net/userfiles/file/77411347968.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/xumatod.pdfIn PDF document text
    • https://cfacgroup.com/uploads/FCK_files/file/vadedupakugot.pdfIn PDF document text
    • https://reha.bg/content/upload/file/zokikuzox.pdfIn PDF document text
    • http://arredamentoambienti.it/img/file/gugolesaf.pdfIn PDF document text
    • http://bargiel.com.pl/ckfinder/userfiles/files/dupujofizef.pdfIn PDF document text
    • https://homestayhoian.vn/uploads/image/files/guvifolotukag.pdfIn PDF document text
    • http://www.aunay-sous-auneau.fr/ckfinder/userfiles/files/xeguxajejopidevemimigole.pdfIn PDF document text
    • http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/wadodizipexeker.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161375f42f36bc---tagub.pdfIn PDF document text
    • https://kotata-zlin.cz/obr/clanky/file/dixexeralolofubakuwuju.pdfIn PDF document text
    • http://qianshunqs.com/admin/upload/35155225337.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/056376268563ebc9a4ea3311d1ccce5d/29576891561.pdfIn PDF document text
    • http://ndc-group.ru/uploads/files/sonosaminitani.pdfIn PDF document text
    • http://idolyokocho.com/js/ckfinder/userfiles/files/lotebodexezip.pdfIn PDF document text
    • http://sbkf.org/files/files/jebiwenupinuxuni.pdfIn PDF document text
    • https://loctra.net/userfiles/file/853795595.pdfIn PDF document text
    • http://riggi.ru/userfiles/file/pifaladepasis.pdfIn PDF document text
    • http://gfzgt.ch/upload/file/21655817487.pdfIn PDF document text
    • http://italy-ex.com/images/blog/file/raniravitizisavananodusa.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/27cc02e65d22d7e587ee5012e80602c1/diturope.pdfIn PDF document text
    • https://emons-verlag.com/testarea/cwsCMSlight/media/files/vofazogapes.pdfIn PDF document text
    • https://kaparatt.com/images/File/89045663680.pdfIn PDF document text
    • http://christopherspubandgrille.com/userfiles/files/9109134001.pdfIn PDF document text
    • http://lonerangerfanclub.com/ckfinder/userfiles/files/vewipijuxowik.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_off0000df2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF743 11104 bytes
SHA-256: 1825085ebf67d84ddee952910a76c62857f270735926a6d3cc30f50469e3e880
font_02_sfnt_off00011104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11104 19488 bytes
SHA-256: 3c1de14e805b210a2912a307f02932dbeb802d24683c731a2198b224f02d48cb

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