Malicious PDF — malware analysis report

Static analysis result for SHA-256 e64b59ea18c62faf…

MALICIOUS

PDF

84.8 KB Created: 2021-07-08 19:27:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b7edf744a8e281684a6028541e32675f SHA-1: a6a2143a0d31da0b9b20f8ad308dbee309884051 SHA-256: e64b59ea18c62faf2853ff0143b23374a4c60e01e2e0680efae0c5187451fbd6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/a2e8fd71f7dba6c5e559a4a7c68c73f1/zeripud.pdf
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/166b8154edbdf686840136e3d1493242/8931431459.pdf
    • http://buffagiuseppeinfissi.com/userfiles/files/90882021004.pdf
    • http://tykhestudiodesigns.com/clients/7/73/7311521ca682816632878891c231d107/File/gefudavojexiriwexiwobuj.pdf
    • http://barbusci.it/maisUserFile/file/teralanezafagaduzoxukowe.pdf
    • https://dallaslandscapedesign.com/media/files/memabezajuvitakevulu.pdf
    • http://dlzj.net/upload/files/20210604064313716984.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e49785784a7---revisesuzizafediweri.pdf
    • http://emailreceptionist.net/userfiles/file/53517125013.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/fe69081f4985c2bb04cc6bb4b40953be/loboben.pdf
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160832c7864535---88834366427.pdf
    • http://aweibel.com/Photo/file/jusewapilixaxiji.pdf
    • https://alarrabnews.com/images/content/content/file/zotufibajumedodawedunaz.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086ffe3eacbf---jefinupixurivivogonave.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/16070e2a146c5e---wupodovufigijurisitisip.pdf
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/9fec5ac64a5ddea9cdd6fadcbd70f234/susuzarojilivid.pdf
    • http://www.injamal.es/nueva/ckfinder/userfiles/files/94572692861.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160abcabae5082---kolesinexiwelumufa.pdf
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/8p55r2lsvhj76kfavhdqlt65j7/2606843278.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f1cc24ae3---30563443625.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160839d3d1d1fd---nomomafurizon.pdf
    • http://aimic.com/userfiles/file/98806335049.pdf
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/e6d30d8662cbbb561c05f17f522a5ad9/1867122393.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=carrom+pool+hack+without+human+verification
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e630.bin
476f39bd9d981c79db227ef8a51b54a1f4ac00707c617dc738e4d2abd57d0201
pdf-font-stream PDF embedded font (sfnt) at offset 0xE630 17028 bytes
font_01_sfnt_off000112b7.bin
cdd61d3f55d0cab08c7ad8863435c69676156cf24e3e04fa74d1792e56e60dae
pdf-font-stream PDF embedded font (sfnt) at offset 0x112B7 10952 bytes
font_02_sfnt_off00012bff.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12BFF 16792 bytes