Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f2af9a93cdd4687…

MALICIOUS

PDF

85.9 KB Created: 2021-06-23 10:16:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 91a5cd14aa2725354610de29e6f752de SHA-1: 93c0f63538ae6cb6f3eb69ddd0ea7b1a2df41a6a SHA-256: 9f2af9a93cdd4687e9fbfdb8a5b899cfd14aafe5c61e2cf7959ef03b2c94b1d3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to numerous compromised WordPress sites and other disposable hosting, indicating a phishing or malware distribution attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9583

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://karapinarinsaat.net/userfiles/upload/file/kopebewita.pdf In PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/7b1df009bc80b64b5c2a6ca1beba983a/49485866195.pdfIn PDF document text
    • http://weifong.tw/fckimages/file/25590310427.pdfIn PDF document text
    • https://hijaulumut.com/contents//files/50484392386.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/ac259ec256888e3037544bce8640fd9d/vijokerovagakexikazudumuf.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/lidho03a30mt7v9avhef4kdunj/tuzasujewabe.pdfIn PDF document text
    • https://sailstudy.in/ckfinder/userfiles/files/nitirokonunafelojetaxaru.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/100649f2d5fa2cc09a2b3efc0757964e/57511928439.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/tm2mh1qt8rp7c39omr53l17et2/77331506773.pdfIn PDF document text
    • http://midel.me/userfiles/file/zogusib.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/62e46fae1f29eda0c5ea351197a58d89/nowapimuduretogok.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/s1o1ek2j3jjdpopflh8q4detje/lefomewotopibelolodepiken.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/b05ab8581fe74375b96b5ee0692ac29c/dezumuzu.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/507166dbn98ld9j50mf9k5mqgg/62946647166.pdfIn PDF document text
    • http://www.heksan.com.pl/file/ramoxogitosuwagim.pdfIn PDF document text
    • http://kashima.cc/userfiles/file/43115502788.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/h9im72k9ohgk0k5vtg8brp89eo/lifedubepelowo.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/6c1b7112b661a08518f7052cc2310f27/vexoxomuzolipajanefixolep.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/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=sound+class+9+worksheet+with+answersPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13773 5444 bytes
SHA-256: d3c988df87816555682b7674d77691ef4b6d2667bb467e2145c80c61e8c54ae2

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