Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ae74c80dfb839bf…

MALICIOUS

PDF

92.5 KB Created: 2021-07-20 08:17:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c5b95994f34f36a3992cc345492372b6 SHA-1: bfee87236c086d6404e401339fb6eb53b036a2f5 SHA-256: 1ae74c80dfb839bf30f6010bde29db0bea91ca0e2842ec365ebb0bd8b175848f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 6

  • 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.
  • 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://xn----8sbcehyodmtf1czh.xn--p1ai/userfiles/file/30547291670.pdf In PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16070c4bd22278---tuluviwulomagig.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/926b6b90e2e8d01ea2284c8ca0f5a917/84564715735.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d823159b76---powosowunopujelegagifuku.pdfIn PDF document text
    • http://littlepearlbooks.in/data/eimages/file/vojugirilinuvexinipi.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083263934583---xilixinilaletato.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/18208509883.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/ca26a8cda5f5e9b15dbe1a38e95479d4/40462256865.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/pefevopizuroxunesu.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/110e8ea588a1498c8499ebb5cec810ca/29709704617.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/5bb55c5097b5424fbeb6f02ffe5dab73/gulizafofinijuniwexoxejel.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b6129a879---71538734210.pdfIn PDF document text
    • http://jerseybankruptcylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nidenivasitisiwamape.pdfIn PDF document text
    • https://irisapp.cn/uploadfiles/fckeditor/20210618/file/16240048184889.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160783b7741524---zujipanapudup.pdfIn PDF document text
    • http://kbo.pl/ckfinder/userfiles/files/foritodotidalukijiposox.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/06344ede7075b26df992041f71ee0f8a/bareramekunig.pdfIn PDF document text
    • http://csc028.com/userfiles/file/20210624174406_boxku5.pdfIn PDF document text
    • http://pandoreunion.com/clients/81456/File/98218530759.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/ff8c187fa41de8bfa4c46ddd62808f98/jagalojebasebupinawometi.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083cb0609134---17493615747.pdfIn PDF document text
    • http://dhf-china.com/d/files/lefuwuguvobanimu.pdfIn PDF document text
    • http://mabo-meccanica.eu/userfiles/files/62521606142.pdfIn PDF document text
    • http://www.la-rocca.pl/app/webroot/files/files/8106625362.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=box+office+hit+hollywood+moviesPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/5be9cf12dd4fb7ba88632167bbdd8f48/16506721754.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_off000103d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011be7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE7 18636 bytes
SHA-256: e1486929c34f094d76d727f2e0bcba72e35dac25b55e2391cd9b9b0529cb443f
font_02_sfnt_off00014bb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BB7 10796 bytes
SHA-256: 74f6ea114c252709fa47ec885fcf05c4f1859cbdd8889b93b5a76b96b0bf9d77