Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cda03ee83bdc31f…

MALICIOUS

PDF

93.8 KB Created: 2021-07-21 06:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 750bef412dfe9577ff26eb78f588f3ae SHA-1: 2a7053142c5ce0f94bc0013b2fb756e589e3ad46 SHA-256: 2cda03ee83bdc31f99acb5d4ae36a86218f061fafeda184cac7fff56feaf0f16
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/13954b06439b6d8a903d687bbeb59794/muruvojibif.pdf In PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160870bd80d226---56474325551.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/34958371623.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/2fn65v1o89ibjvmsh6p8l0caf9/57956818114.pdfIn PDF document text
    • http://www.toptehnik.si/images/noraremuwo.pdfIn PDF document text
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/dab1506691b4516cb7346a784729a081/kajimena.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d350822b0d---59623846588.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/52810291144.pdfIn PDF document text
    • https://ssvacancy.com/ckfinder/userfiles/files/54390172046.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/4adea0bc174fea46deb23cea9070345c/wakusabuxubonas.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16079d83f7928d---62345673994.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16077ac9b0ad11---pipesoziminelef.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/b67ff1649152a69dd85c66df5fea9af0/97475739540.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/laxirebejafudigalowadupiw.pdfIn PDF document text
    • https://mauspro.net/upload/files/vogapidelegagaridelisi.pdfIn PDF document text
    • http://interwork.sk/userfiles/file/xovafekatebafojesavejonep.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a9237e29f---lobamaparekepadipa.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/9a193c9a3ae7e0a155c745e5aac68daa/13272816803.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160e5d1753ea58---58313522168.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc0ef9d4cf---lalasajajosafojo.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/mizobez.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/d7ad9523edf3bd1855956dd52a8b0ff9/83271150529.pdfIn PDF document text
    • http://fujiya-burbank.com/uploads/files/76974661047.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+draw+a+pentagon+step+by+stepPDF 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_off00010b2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2C 17752 bytes
SHA-256: d2c72b030a256e80f635c14efee8121c1fcd28eec904053d10067322cb27865a
font_01_sfnt_off00013972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13972 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15189 10760 bytes
SHA-256: 997dcec8e4c4ddfc2c78639ecb70ef6e5eeec508e6f936bd6450e509ab2cea40