Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3f062a4d558f478…

MALICIOUS

PDF

62.3 KB Created: 2021-06-28 20:58:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a760303c6fd6e5c335085712f0e69e24 SHA-1: 9e56f502542b87ccc183a20254af644edcbb4023 SHA-256: d3f062a4d558f478aa4131b174ba5ec77ad771b3d5b5e21e4b71957878f8534c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5277

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.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/sb0gf05im4i7bamfu1eu9hu3m2/tisafupowa.pdf
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb985654ac---30142476843.pdf
    • http://allprintusa.com/admin/images/file/65932500962.pdf
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b02973e9216---runapurig.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/72f046b76453aa926d45f904bcc3c5f3/90763612925.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160c76e9370e24---2142311749.pdf
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/pli52ec25uhmtpavht2r7s28o5/zewoliminujuvuditu.pdf
    • http://splogservice.ru/content/file/povelaxomiwexarowe.pdf
    • http://pamat.ro/UserFiles/file/69774512195.pdf
    • https://diaochue.vn/userfiles/file/defawodibatuvul.pdf
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160939fa3b1e92---9451672946.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/gec55u3q1kdbtukmcn9br1sii4/71270982856.pdf
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/lre1t3c7sgohqkqk3lomdo1vlq/fafasojopud.pdf
    • http://www.bluewhaleline.com/image/upload/File/rivobevudam.pdf
    • http://ajtoablakcentrum.com/_user/file/fuzubasepolor.pdf
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/cbd61067be8c3894ad5aff12ada6b33d/77180482646.pdf
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/2m6q2ufpqt9a4s5no94jritt3q/91081924705.pdf
    • https://strategieb2b.com/userfiles/file/depovudalamejojijoki.pdf
    • http://stolocatering.ca/clients/874514/File/dezinonemowirotusop.pdf
    • http://tumwebthailand.com/ckfinder/userfiles/files/59995374753.pdf
    • http://onlineticketreview.com/images/file/92321668946.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16085f709d7b76---zobezejitedepovedefawibu.pdf
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/06cb424318b4deaccb1c1af9509613d4/nopazujalerebusawadiruvur.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=to+room+nineteen+pdf+download
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4d8.bin
497df1ef13f53dc4e101951212393354e5ecd45b963abd6e188780add67fbe3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D8 1848 bytes
font_01_sfnt_off0000dd5f.bin
fa1c929fa642cfcf0b0f43639b68849163276d5ac12b3a2745509c9e16db8afd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5F 16592 bytes

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