Malicious PDF — malware analysis report

Static analysis result for SHA-256 1385388b41184592…

MALICIOUS

PDF

77.9 KB Created: 2021-09-23 07:43:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1ce62c028fb160de9d433751e7419afa SHA-1: 5c1e216e8b86709cd16e80db2f418f5168f7ed70 SHA-256: 1385388b41184592abde38d79cadd431f489c824bd2f52c7f86a3a0a293089e9
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm directing users to various external websites, some of which are hosted on compromised CMS uploads or disposable domains. The primary purpose appears to be directing users to potentially malicious or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7562

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://laborke.ru/uplcv?utm_term=how+to+export+photos+from+android+phone+to+computer PDF link annotation
    • http://xn--hh0b97d8is16e.com/userData/board/file/takamomepox.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef1305e41c---basuzesufusagedobigekeru.pdfIn PDF document text
    • https://www.burnat-provins.ch/ck/ckfinder/userfiles/files/povegi.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/61812295481.pdfIn PDF document text
    • https://mangalargalux.com.br/ckfinder/userfiles/files/tuvugonamuwupudexarelaxa.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614bfa035845a---89969576095.pdfIn PDF document text
    • https://5uempat.com/contents/files/25694668485.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/36ce2e46b15cbd3f6eba553f61922f45/60378287729.pdfIn PDF document text
    • http://kramor.bg/userfiles/file/mubejazapevurunetoluxup.pdfIn PDF document text
    • https://transilvaniafishing.ro/app/webroot/files/userfiles/files/44197109858.pdfIn PDF document text
    • http://montagnobozzone.it/userfiles/files/jakisipi.pdfIn PDF document text
    • http://jacsonsfurniture.com/userfiles/file/94881614488.pdfIn PDF document text
    • http://stagegator.scorchmark.com/stagegator/ckfinder/userfiles/files/23972571972.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/3tgfecmcpm1u3djjv5c0balgm4/jexadazowijunaxeb.pdfIn PDF document text
    • http://kxqcgs.net/filespath/files/20210905183713.pdfIn PDF document text
    • https://hoangvan.vn/wp-content/uploads/files/44136980228.pdfIn PDF document text
    • https://panoramamall.bg/ckeditor/ckfinder/userfiles/files/monasumin.pdfIn PDF document text
    • https://italvaping.com/file/79009781564.pdfIn PDF document text
    • http://www.cavice.fi/tiedostot/files/99308347786.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613e29c18b831---83717486947.pdfIn PDF document text
    • https://ofly.om-digitalsolutions.cn/upload/files/suvorimalusekoredilapogor.pdfIn PDF document text
    • https://implantsdentairesdesmoulins.com/upload/editor/file/nodavilonoxugunuwujevi.pdfIn PDF document text
    • https://0900107678.com/upload/file/vejapaxovotibipolofa.pdfIn PDF document text
    • 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_off0000e8d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D3 11120 bytes
SHA-256: 1f16050105d6e21f6a6a3ed4d6ba93c72b81cb3285101495441f6088b800c4f1
font_01_sfnt_off000102a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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