Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ce86d333ff99eb1…

MALICIOUS

PDF

77.9 KB Created: 2021-06-17 12:54:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 49d1c9a5973522a7ebbffe636c602c09 SHA-1: 412db8d9875ec6276cbd35e9cd2d9fab0c0a694e SHA-256: 7ce86d333ff99eb1cff001ac74bcd022cb5ddbbcec902c42e00155a0136ff91a
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics suggest this document is likely part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9479

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://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/119h01mgd2qr0g5nvtblcf91ri/72235297471.pdf In PDF document text
    • https://repare-ton-smartphone.com/userfiles/file/vixowe.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/e36ee14bf4cd91fbf748d50cd7a041a4/xizone.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f7409323a---49724446747.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/seriligukawumoviriwalet.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608250bb4fc9c---44075154212.pdfIn PDF document text
    • http://group-anons.ru/userfiles/files/wepetapibo.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160a744c783655---gozukumeverevoruvadamudum.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/lukidux.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075fab40d87d---lujovilubutunopozojaru.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/305c1d178a05458d19490c47770368f4/73056408052.pdfIn PDF document text
    • https://arch.ua/ckfinder/userfiles/files/83996930038.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/098915d1dab3e1c89d9a1f22e1ce2ec5/xixezalimopuvowuxigete.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/0e13204ee20a3c2621b23cb208c502fd/62641197290.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/talimelubobatonep.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/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=bill+gates+yuval+noah+harariPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEF 5040 bytes
SHA-256: 16088f89b015532cf8ec7df8de8777334ecd7fe3b0964ab93ed01679002bd3a8
font_01_sfnt_off00010d0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D0A 10992 bytes
SHA-256: 94152ac512eac942c58daf67bce1b1ffeeb18de540fd1f196ab129d413022959

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