Malicious PDF — malware analysis report

Static analysis result for SHA-256 d21d6fabd8f9f8b2…

MALICIOUS

PDF

54.6 KB Created: 2021-09-06 14:11:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fe6f2ae572b6496502adcae5d3e20d8c SHA-1: 192def89e204e2a857dc732de5dbd1b8ffad0463 SHA-256: d21d6fabd8f9f8b254abe9217a185aee031ca82793f4513c0c3a71a7cd3238dd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous URLs pointing to potentially compromised websites and disposable hosting, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are sufficient to infer a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6962

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://oniceh.ru/uplcv?utm_term=enamoramiento+saludable+pdf PDF link annotation
    • https://nhachoxebus.com/upload/fck/file/jovavati.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a910f4c8c32---63077153348.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/66e49c39c2e447a2fe151f53d9870312/sasilusu.pdfIn PDF document text
    • https://decoveinvestment.com/userfiles/file/texun.pdfIn PDF document text
    • https://landbar.com/upload/files/52685961182.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf6e677779---gelobi.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-6-8/20210608004632173897.pdfIn PDF document text
    • http://headlinesdinerla.com/uploads/files/66078055793.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/621b86ab7d3c2d5d9d226b22249350c5/jonedakaxorebirugiko.pdfIn PDF document text
    • https://la-klamm.org/userfiles/file/77713784827.pdfIn PDF document text
    • http://titadoorbinhduong.com/upload/files/fevesotabimo.pdfIn PDF document text
    • https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/0fc33136759a0bdaa257b46c01def681/jumalowefafalefusuxoros.pdfIn PDF document text
    • http://maradonasalud.com.ar/ckeditor/ckfinder/userfiles/files/rezadiwavelobujume.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/7m7kusbqs9kncklodpli4klb83/15824424358.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d44aee39f2---jumetipubolekagened.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/20210602/210602123820643710jvblzgoy1mgf.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/90587468874.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609acd0a0eb82---47154064594.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16095da6d4dda3---fepubimibab.pdfIn PDF document text
    • http://somersetcountybar.org/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lizewesuxutovuxiten.pdfIn PDF document text
    • https://neplatnasmlouva.cz/soubory/32117824033.pdfIn PDF document text
    • https://realxenon.ru/uploads/files/90516272680.pdfIn PDF document text

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