Malicious PDF — malware analysis report

Static analysis result for SHA-256 17e5d733a98e3dad…

MALICIOUS

PDF

54.6 KB Created: 2021-05-09 11:24:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 975dcd4d11d2375b7a65b4fef4ef3a2f SHA-1: 4de02c55b8c7d124b1c10c8f310f3a8d58925427 SHA-256: 17e5d733a98e3dad2a1fdafbdc6b85d15320a124d489ae3ce043321dad992eea
154 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs and the heuristic firings related to link farms and compromised CMS uploads confirm the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9804

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://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a0c04f1be---86908908335.pdf
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/fa50eba1968385e2169ddcd9a8917375/befowanamo.pdf
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160972b4b5ce31---53911900108.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfad8ddf57---76014930426.pdf
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160715521efbc7---19985512651.pdf
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/0019ed56658d2f26b5bd979bc2db2037/19088630717.pdf
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1608e2612a463b---pinenajubisigabu.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/0eb099ca374b7e2c5453ba78cebf5a7a/rusupotus.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/54dff4458e28d3ef9f96331d9e0af131/28261574710.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160856ad0c5d17---19847515612.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076926b0a166---59421839132.pdf
    • https://netshopnepal.com/userfiles/file/zogidejuwunara.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9ecfcabda---xinaluxegebenefitatol.pdf
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/g63kb7ch7p439smqt6c4ij3un3/68270396683.pdf
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e919634fe6---tasotamamida.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16072f04dea501---donudojifalimuselo.pdf
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/1557802ad3f59b5bc2bba08531ec9fe6/24172260760.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=skyrim+steam_api.+dll+crack

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