Malicious PDF — malware analysis report

Static analysis result for SHA-256 361addb54c7f61a7…

MALICIOUS

PDF

63.8 KB Created: 2021-05-26 07:04:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6df189c601c1be8dee67cb0cbab102f SHA-1: 5a24d7a1d12c7272eef4ab1033d4eac8bfd09847 SHA-256: 361addb54c7f61a7d32d2f82313efe6ca1462a6983b22fb996fa2ee6ede9c238
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites, suggesting it is used to distribute or host malicious content. The PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristic further supports this, indicating the use of compromised upload directories on websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9756

Heuristics 4

  • 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.
  • 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 http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160735ae6a6dc4---bifepilitagu.pdf
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/jibrp9c2nb0istpaoqunampv21/tapesoninopiposelituxid.pdf
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/de24ff7c02c7cb5862b0631f5e94aee0/pabisafaginupukenedufiga.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/9ef982319dfa53297c20342004f56b3e/merul.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160adc57497d52---bibupujusexini.pdf
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/779a4847595891366c6cca82240cab21/36804130779.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160923ed0a65e2---mejusadabudepovibita.pdf
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/c2af9293832d79d7d3b5e91230cbc3ab/gidakesidezob.pdf
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/ecb407b16f6fa7a661669c2a226f6734/ledapatizub.pdf
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad502092e9---66345954653.pdf
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/8c81128958848f06436b9b805648628c/xolatimipuwajatimobun.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16083dd6e47ae2---sapuwilomujejuruporaguke.pdf
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/2c4e732308785ec8e6fd7bea121a7ed8/tavagajozivakewaworobom.pdf
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609087c0b3458---temamumolukomuzi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=besame+mucho+sheet+music+pdf+free
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcc7.bin
b33c15dcb3d5c5b651c409669f1e8e0a1621a3adc34e5dcfa22b9b2392e180bd
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC7 5412 bytes