Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6e76de298b42ede…

MALICIOUS

PDF

62.5 KB Created: 2021-06-18 15:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a8f5b97665475489011f7d4dec7ecd21 SHA-1: 86b7203d1d11fd56a01e376798cb93fc55bb150f SHA-256: c6e76de298b42edef511d962c1f391bd2aea3e915b8446459b71f95f6c4e1fc9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm, directing users to multiple external URLs. Several of these URLs point to compromised WordPress installations, suggesting an attempt to host malicious content or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a2277bd3e12---42187180147.pdf In PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/36fca4f7039075fc9a343a71ac3aba58/37546697299.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/50260178998.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/873f3e366b6dd4558e2576c6e2e3f23e/zizizovam.pdfIn PDF document text
    • https://ienter.bg/files/jowozuwiwirofezajam.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/5061421154.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab47ecd984---gasomazazivoxajaxeligokex.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfee8db0c2a---67752999158.pdfIn PDF document text
    • https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/b089bb1c14bbbcc98b9c79fd36a0ed2f/27802204722.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a526c61a7e9---3522138534.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/61c2a3beb8672d4f93cb7658a73896ff/zowidupipogekapebepezo.pdfIn PDF document text
    • https://mfdesign.hu/files/file/noropefodejoke.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aa93ba32450---fadaxetopulad.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073db4d9b45a---rejupaxigeribupekafa.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/63abc5726589dc66fcd58abd8acc83c2/tipujek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=hotel+california+chords+capo+2PDF link annotation

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E4 3740 bytes
SHA-256: aa2b1730a682d66b8c632e4472e732b6e187071f26ce07051ac3372f0d19e74a

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