Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b4c664e7aeab98e…

MALICIOUS

PDF

72.4 KB Created: 2021-06-23 13:42:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5e2a4e7978e4ed4b03386b44e18e9ed5 SHA-1: db65eff0b63b2dac5da29988a58e9f9891c946b6 SHA-256: 8b4c664e7aeab98ef6cc8bd22e8741c27cd0aab6459ea52fd49d63496c45a3c8
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phishing pages. The presence of a URL with a 'utm_term' parameter indicates a potential phishing or malware distribution campaign. While no scripts were directly extracted, the PDF structure and URL patterns are indicative of malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9668

Heuristics 5

  • 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
  • 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://irlanc.ru/uplcv?utm_term=my+beautiful+dark+twisted+fantasy+full+album+download+zip PDF link annotation
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607eed410cecb---tajekekepopo.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606effa90f3a9---nipimepezopovozasawip.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/j4pe4rplnbhu9k66lo43tl89uf/427957402.pdfIn PDF document text
    • https://cbdc.co/uploads/ckfinder/userfiles/files/83620082193.pdfIn PDF document text
    • http://johncarroll1967.com/clients/1/18/1896e795ecc2602204d707ec4e69586f/File/50623319379.pdfIn PDF document text
    • https://syteq-pro.com/userfiles/file/poxulejip.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/4d7e9f33a2dc3045904a906ceafe5f53/28454161910.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/4505ebf467c3674530c9896213bbdf2c/wogujofo.pdfIn PDF document text
    • http://asfalon.com/__files/file/fafobokal.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/4442562ed8658ded2f77d60df0a75dfb/63376245957.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/i8iqq37khedkgk5djggj02ldf6/11609765720.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d9463e8e5---2985384115.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b11d61a597a---28699437881.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa1c7b1af1---fetamakekulew.pdfIn PDF document text
    • https://toromecanicorodeo.com/files/beritisasubafefimed.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c256ef52816---dibuxidukasa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B4 5640 bytes
SHA-256: d272089cb45c01ad2af85f874868ba1eff49d54e25843855ac54cda4958202c9

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