Malicious PDF — malware analysis report

Static analysis result for SHA-256 1399c349e48b48f0…

MALICIOUS

PDF

63.1 KB Created: 2021-07-01 21:04:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: dad267cf2cf339e6856e0f9385758f22 SHA-1: ede3757e8baa1919c172582de6ef29fb4cda70d7 SHA-256: 1399c349e48b48f024122dde071fdf53f522c43c58d8dc092cca6a9dc8c31a4d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, many of which point to compromised WordPress sites acting as hosting for further malicious PDFs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lure users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9212

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://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/f45587a9bdd8973d232aabfce963294a/taxigevetowamubofizufaj.pdf In PDF document text
    • http://botosani.ro/img/uploads/file/satatorazesinaguvoru.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/9t5557qimleuaf7jhop38qqgq5/8185917137.pdfIn PDF document text
    • https://baigiangtoanhoc.com/upload/files/xabul.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607c664657874---25218939729.pdfIn PDF document text
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/10288380702.pdfIn PDF document text
    • http://influences-vegetales.eu/assets/Image//files/butazowasedilegezap.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/mofosozimotaradolanok.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c975612b6---zorogukuxa.pdfIn PDF document text
    • http://gdlianyu.com/uploadfiles/file/buvop.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b337f4ba890---nawogosan.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/raxesenofuxesunam.pdfIn PDF document text
    • http://imailbox.nl/images/uploadedimages/file/dovomulinosiwipejugegu.pdfIn PDF document text
    • http://pcserviszlin.cz/ckfinder/userfiles/files/xurujajevaxen.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/1f0fcd74cadec351c0ae960b0464d710/44806785225.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/d74e08e8176c18330130b5d2ffceaf26/66347088456.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/ebb3a71c8b511bfa8769b75cf2c74fda/20284697931.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/lulugupolulixen.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608702ee920c0---43562860628.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/d239b894d89cfeb3085c94cabd1cc12b/95008475240.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/gamewivunasezinu.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/87kjooggi937bo7hbng754ch6t/gumopavigogapozapifeje.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/39103996926.pdfIn PDF document text
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/pemarilizamufifom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=how+to+convert+word+to+pdf+on+windows+10PDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC9F 10724 bytes
SHA-256: e1a852bf2ea8d8cf2c25b8f0f9c23a6f299118f8986b509a7529ef781573c7a6

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