Malicious PDF — malware analysis report

Static analysis result for SHA-256 731dea706231110d…

MALICIOUS

PDF

112.2 KB Created: 2021-06-18 16:23:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b042c010b700cb923497e9552a48127b SHA-1: b653cdaf04d2690073eb9eee4ad618b903f54df2 SHA-256: 731dea706231110de1e7eb80f657ed33d7a6e01547e85331b4bbaf165f8a565c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is classified as malicious by ML models and ClamAV, indicating it's a phishing or trojan delivery mechanism. It contains a link farm pointing to compromised WordPress sites, likely serving as a lure for users to download further malicious content. The embedded URL 'https://laborke.ru/uplcv?utm_term=among+us+macbook+free' suggests a social engineering tactic to entice users with a fake offer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6156

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=among+us+macbook+free PDF link annotation
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b21325f2c8---31916582562.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/6f2a4ee45537ee0096b09fff5b718b75/86090234714.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/72599060477.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/pariwirasadasobutupinired.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3847ca99e---nupifobimoledugufijarow.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608d2d7da6669---pobuvenenuzixapegota.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e73ff8f6b1---13656266862.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a414c108b4---76237848053.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/45304953545.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc4fe3f91f---32178326768.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/1814efcb8cefb8d486be2d025bbe5a91/87389935982.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/j3rup48eoom9n8th3ibpeg9fgv/rarapaw.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160716bb9cbafb---kozozuvimivo.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160787656bdd7e---12778789587.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080b490e0086---silam.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083290bbd9e5---51479619437.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/37695514969.pdfIn PDF document text

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