Malicious PDF — malware analysis report

Static analysis result for SHA-256 95102549016455a7…

MALICIOUS

PDF

62.6 KB Created: 2021-05-10 23:43:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c403296935908a9452a4a14a4040c0ac SHA-1: 24ea5d282309631e842bcb53194e61a99aafe764 SHA-256: 95102549016455a79a7c97105800b4e29a2bd050ab54cceab7b031ef144eddd5
154 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised WordPress upload directories. The document body contains garbled text and metadata suggesting it was generated by wkhtmltopdf, likely to obscure its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9594

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/4fb0ba58753ccfa8be70c577aeb323a0/wiroz.pdf
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608528d876c31---xexepulofanaduwomes.pdf
    • https://ficsllc.com/wp-content/plugins/super-forms/uploads/php/files/d0582dmtv07hull021v52aogf3/66575630443.pdf
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/2ae9615ed6d9c6d231f1a7887b5ee1c6/raxed.pdf
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/ca03ad8f1506235bd329e32db8246f5f/29399866564.pdf
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/soninelutokatatufo.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608a12865f391---gatomikimojozekonarese.pdf
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/0cf2c46f8582f4f5b5bfdbc4889b25dd/bafalodu.pdf
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/96a087e3fd52a665dcfdde1e68124f35/76115632756.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094da8603c5f---70383084552.pdf
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb2480ce9e---16506353113.pdf
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/33f039fc0c144fd6c28d771020da3f8a/69427112407.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb0cba0177---zupejaraxagirugapod.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/e74611778a24e94e2fdf95170df2e67d/59934578585.pdf
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/5e6780a1cfd386a3138144c86edb7fbc/77058459824.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=miya+bhai+full+video+song++pagalworld
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc90.bin
cd690f4d267eec40e2af1c6b97139a62bbdecfbf1f6210bd7f47cead3f5628ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC90 3340 bytes
font_01_sfnt_off0000d8a1.bin
915e591b842d03ab3c87d65f3ba5cd83271fabca8e5be2ced686d0653d72d08b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A1 5700 bytes

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