Malicious PDF — malware analysis report

Static analysis result for SHA-256 53972769fd593805…

MALICIOUS

PDF

86.0 KB Created: 2021-09-15 15:58:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ac5a00dae0ae6ad3395de59fb0da9af6 SHA-1: 798609edee25eea336ef0c0f533f8e8d4f15c607 SHA-256: 53972769fd593805b49aaa421abf1054bc9a3c682d411337186ae90e705999d0
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to compromised WordPress upload directories, suggesting a phishing or malicious redirection scheme. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification. The file's structure as a link farm indicates an attempt to lure users to external, potentially harmful, sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3358

Heuristics 5

  • 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
  • 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.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16130afe35c5f8---ruropamaxiluzovirep.pdf In PDF document text
    • https://apz-arte.com/ckfinder/userfiles/files/pivemotax.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614177594372f---98904307295.pdfIn PDF document text
    • http://spalovnachemolak.sk/userfiles/file/83104083754.pdfIn PDF document text
    • http://greenmodels.ru/uploads/files/pibezajuwumalop.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/diserezibomegosedejobaniw.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d33a143b58---nizunetadabudelada.pdfIn PDF document text
    • http://hopkim.vn/upload/files/rogufotoxemorebitisebused.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/fc6d9c35aafcf1a5fdf53ccda4592072/wagaduveg.pdfIn PDF document text
    • http://sk4education.com/ckfinder/userfiles/files/12341863829.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138543ae45fc---41702164787.pdfIn PDF document text
    • https://producto.works/userfiles/file/gaxofuniwobemexeramijoko.pdfIn PDF document text
    • http://jimsclub.net/new/board/img_tinfo/file/20210904184815.pdfIn PDF document text
    • http://lrm.mcdonalds.ua/ckfinder/userfiles/files/86532596686.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/16136efceabb73---pilatubumetonokefomenipup.pdfIn PDF document text
    • http://bakersfield.thepokeluau.com/uploads/files/jubuge.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/69480918281.pdfIn PDF document text
    • http://szentdorottyapatika.hu/files/fejoxupomewuxunuw.pdfIn PDF document text
    • http://oppedisanorobertosrl.com/userfiles/files/34556991718.pdfIn PDF document text
    • http://csc0516.com/userfiles/file/20210902122521_pwhvbe.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/ddc3b6444f897232284bc2a1d1c6772d/80996634467.pdfIn PDF document text
    • https://mclandpin.com/calisma2/files/uploads/mokurolamo.pdfIn PDF document text
    • http://sbairs.com/datas/files/4108443219.pdfIn PDF document text
    • https://nutstudio.it/userfiles/file/vulijexuxofegutiromuni.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=once+upon+a+time+in+shanghai+full+movie+onlinePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10175 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001198c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1198C 11016 bytes
SHA-256: 76a427cd0112643c4ebf8cae1e6db300391eb5d402dcddecaddc7386aaf90bca

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