Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aad9d27797eec00…

MALICIOUS

PDF

64.0 KB Created: 2021-06-18 07:28:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b8a6a1e32bee411cd11b179b0810abc5 SHA-1: eec0f70e15d6dec40932c25b6b2a60c3a1cb8a86 SHA-256: 7aad9d27797eec00193920eac0ac7188074130c42fe3f35fd3a631dda2933459
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, many pointing to compromised CMS upload directories, suggesting it functions as a link farm to distribute malicious content or engage in SEO abuse. The presence of these links and the overall structure strongly suggest an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8702

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://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/2a46d81d51215f4625f2d70ac5d9eb3e/81655338827.pdf In PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16075f09ec1c72---74167182007.pdfIn PDF document text
    • https://dichvumayphoto.vn/webroot/img/files/rivalibalulanifatujitujo.pdfIn PDF document text
    • http://stepsforstarlight.org/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/75833052812.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cbcdb80b072---zijifefatisovagiwexufogox.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/9232792f869006736278a5e0fa98d286/vewopabumatisoma.pdfIn PDF document text
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/4609860751.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/be54c38a7d17fa7ea56d16f6f9a0b6dd/rojisosowuxenuj.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/bdf9dc783ef0eaf76458bfa8cae335c1/selesidaxevaki.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/9q55kldko364nqi8kc2t0a7k2q/rorewukakewedebovobomexi.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/nazoduduzumugezix.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/761999a95016fbd1e9582d37b24d9abe/natobubisejaf.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/20e958b8495d89ab5bf90efb30e6b3b3/xivob.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/gqufrdq8ll82g7f8e0aea71f8j/jusonanemezadagivepa.pdfIn PDF document text
    • http://abaj.cz/UserFiles/File/62895403623.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/90ebaa4951bc9bf423da4756841ba07e/zumazifop.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/ueh5obdchagadulomn29f9ad65/65839936546.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=modded+by+sami+gaming+8+ball+poolPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF57 5332 bytes
SHA-256: 8b94ee69bed63fcafa53d674297f35163f6d75157e284e7967c37da333f8e980

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