Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e0cd00b18b7d909…

MALICIOUS

PDF

48.0 KB Created: 2021-06-20 21:55:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56fc90a7b6bc1351bb28eb0b3e9ae6eb SHA-1: fce3b0a0b7895686b3e5404fde878754ec592554 SHA-256: 4e0cd00b18b7d909727e8ebfc84a2cc1bea58b5f11c28f0240797e823f35f217
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. The heuristics indicate it's an image-only lure designed to trick users into clicking embedded links. Several of these links point to compromised WordPress sites, suggesting a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7193

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 48 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/bt9nrn78vt3ttt88vodvdkdl5h/1864966389.pdf
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/2ca376b59c4c535a99987e8a1a3b2ee2/52391999668.pdf
    • http://iqlacpro.vn/emotive/upload/files/54240350257.pdf
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/90a5722a727afd1497df5bf21bdd0255/fuzasavupibutawekonofil.pdf
    • http://asupuro.com/user_data/image//file/wuxifovodugujow.pdf
    • http://mevlanaasm.com/resimler/files/tidovonojakadegewame.pdf
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105080147164417.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606deb761837b---73020096956.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16077aba861ce3---27187264462.pdf
    • https://chauphongasia.com/wp-content/plugins/super-forms/uploads/php/files/lrcr9m0proig34va1boft6sjeh/28218997891.pdf
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/hm5qeq86o1f585a5aeivs9m1t2/28655273241.pdf
    • https://xn--80afc2apd5n.xn--j1amh/upload/files/fekupexuzufekijun.pdf
    • http://ipost.mn/ckfinder/userfiles/files/wufuxobalopaxat.pdf
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b81e325c5---36689282647.pdf
    • http://automsystem.com/UploadFile/file/20210528232034062.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=postfix+mail+server+configuration+in+ubuntu+step+by+step

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