Malicious PDF — malware analysis report

Static analysis result for SHA-256 d53fcb98bb1c7155…

MALICIOUS

PDF

53.1 KB Created: 2021-06-24 12:51:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dcd06cc5f04616a857f3a856c7a06c69 SHA-1: 614fe8d35fe8d351f9eeff6a04aa5f5a3c3faa65 SHA-256: d53fcb98bb1c71558b38af6a15bd3963cc9feadd443d8c0c4596cc7a59586d15
174 Risk Score

Malware Insights

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

The PDF is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting an attempt to redirect users to malicious content or phishing pages. The document body is largely unreadable, but the presence of image-only content and action triggers supports the lure hypothesis.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6875

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 53 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://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/02a129cff928c8308b382b4c3f429c31/77353243544.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606e4916bf767---sibipeg.pdf
    • http://doks-films.com/pcms/content/file/gimaweso.pdf
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/46594961379.pdf
    • http://finproekt-msk.ru/userfiles/file/gexabavotikozozutome.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160ad96e5669bf---80236787652.pdf
    • http://neonatal-surgery.ru/userfiles/files/27035382985.pdf
    • https://wendi101.com/userfiles/file/19140103158.pdf
    • http://murphysbeads.com/clients/54316/File/padufigigovovabep.pdf
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/c1273c435b8b661ac5108f7cbc9c467f/bajiripesesaxizi.pdf
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/665480c45ff783694706a21d8513f132/durumevekuniwebomez.pdf
    • http://artpolyclinic.com/file/files/rekumezemopozepesodu.pdf
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/b9c730dab18b12fc14aa4db523779580/62406084280.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095d738ae006---mupogem.pdf
    • https://boumqueur-edition.com/upload/fckeditor/file/gabigamologuzeladarub.pdf
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608186659a6c7---15817667129.pdf
    • https://fullhousetourism.com/UploadFiles/file/20210519055903170.pdf
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/81d15e30b87bd76a6f1e2143659205a7/tizibujeriwetomoneb.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=engineering+drawing+question+papers+answers

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