Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce4897254f91f5df…

MALICIOUS

PDF

50.2 KB Created: 2021-06-20 12:56:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 242d15fbc9439846f6f65eaf0a24fd3d SHA-1: 3353e51e62c600bb32d89c44b9af6aa04801be6f SHA-256: ce4897254f91f5df8dcdef7be59bf549633b1aa1954abd0210b24d8f6070898f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier's high score indicate malicious intent. While no scripts were explicitly extracted, the structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7338

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://irlanc.ru/uplcv?utm_term=abstract+algebra+a+first+course+dan+saracino+pdf PDF link annotation
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/vimeah5nqo8a2knm739g3loi61/69496703236.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c1463102dbb---rozoviwigojunobogifanebuw.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/faf9c4f8e2795c9a6b32e99f86cec787/bewugiked.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c815362ea3---61031268356.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b039d24dfd2---26067765814.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba62c76f2c6---35282709693.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1609af2b2a6050---xekekelazebizibeziwafoz.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/9d8sf180cc8d61u9kvd5h0h05c/41351042383.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/941d03fa7b74c1bf424702a7dcd8052b/votebikadarevabakuda.pdfIn PDF document text
    • http://exito-opakowania.pl/userfiles/file/dipexulamoz.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a88e4371083---taxapokekapesupowisud.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/fc476ca42821e6941cc9f0c75675a56e/33056793136.pdfIn PDF document text
    • http://mujuerp.com/uploads/ckeditor/files/20210616151928.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/0aadbe9a4ff9a7ce43182878920468f6/51886715416.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/eb5fcf710a545ec2950b493fb140f4ea/guladarumafotefusa.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/82954632894.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1877357bf---19711959029.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/ld8j655djontd12ao8l2ohf777/wuregewipojimad.pdfIn PDF document text

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