Malicious PDF — malware analysis report

Static analysis result for SHA-256 103b64e46ead7dd0…

MALICIOUS

PDF

70.3 KB Created: 2021-07-06 14:47:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3d9166dde00b1b4d537de45525a1e7ec SHA-1: 80f20c4791ace381decb6c0a594f20468636971f SHA-256: 103b64e46ead7dd0c82c540b94551f4b351f90b41ba559727e8ec31b03d5835d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised CMS upload directories, indicating a link farm designed to redirect users. The presence of these link farms suggests an attempt to obscure the final malicious destination, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5526

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 http://irollee.com/userfiles/file/10572537946.pdf In PDF document text
    • http://m-camper.ru/ckfinder/userfiles/files/tasurawoxabesapav.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb171d1dfc---keserirusenasobolelamel.pdfIn PDF document text
    • https://warungmimpishio.com/contents//files/43139071768.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/doligijemokeza.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a392e835182---pikikufubusefasobezurepur.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a97bf71f2eb---domunomowibani.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/8ttih1kpdso8fcpv16ilil109u/24978297120.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/d21dc4e1641b97f5ad083a0f17175634/44398744985.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e41a0b347f3---19656986711.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/42e3321c1288f6a934421987790c5ecd/mefenuduvulagojulajuseda.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160acd32275ef7---jewegukuf.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/82537352358.pdfIn PDF document text
    • http://cnzgks.com/userfiles/file///19270695378.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/56dda679cd939f9611d58aafb0dc9450/wobuj.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/1fd50d360b7dc2f30bcb5b3c66f7bc82/29073457599.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16092a4680fe5a---kufazurujowovexe.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec5e677059---serogoj.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/84415484092.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/614bdb9376e8e28585cd234f4c0769b2/boxiloxo.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c52e69cd3f2---loninewuwetelesexadomed.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/gunatuzuxot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=iphone+time+exposurePDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/dfa80dfee9669a91c8b483c54fb62769/93539088869.pdfIn PDF document text

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