Malicious PDF — malware analysis report

Static analysis result for SHA-256 1354a6c88aede880…

MALICIOUS

PDF

62.6 KB Created: 2021-08-12 19:48:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 55777f7763a301ee34a1b1d15a04350e SHA-1: d4aca86cacde9a667dfcdc0c4fe5ca7a5380683a SHA-256: 1354a6c88aede880bbb5cbf187aba03b3eb05b8da6e429303afcd9d83b88d702
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing campaign aiming to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9138

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 http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1915f1de09---nawopufopuzijididobazodu.pdf In PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/905ee048ee8ac098ce83d7c095e26cde/sepeki.pdfIn PDF document text
    • https://securityguardsupply.com/php/uploads/file/79483387875.pdfIn PDF document text
    • http://washchienluoc.com/upload/file/96592113844.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160845e0bd132a---gimetekeruse.pdfIn PDF document text
    • http://www.asap-recruitment.net/upload/file/toluxuk.pdfIn PDF document text
    • http://phsclassof1970.com/clients/875774/File/88760578989.pdfIn PDF document text
    • http://altiro.nl/home/tjerk/file/pexadanejesunepovadudulus.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/30cf7770614e547b1d6f8ee7b074d0ac.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c073a4ead25---79098404759.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ba90fec6983---kufivade.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6822f0b8c1---20623263346.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd58417c27---zadevoba.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/bd68784921b18530fe7b53dce633a1f7/87804912984.pdfIn PDF document text
    • http://ipsaix.com/ckeditor/ckfinder/userfiles/files/78889817854.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/176459600060b1baa77ef5c.pdfIn PDF document text
    • http://churchontherockuk.org/home/churchontherock1/public_html/userfiles/files/55813171361.pdfIn PDF document text
    • http://currycornersugarland.com/admin/images/file/fiposesefiwulefunato.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16085b37d90cf8---nimurazu.pdfIn PDF document text
    • http://tillmanfamilyreunion.com/clients/b/b7/b7385abc5988d1ee605fea7695e3d00e/File/zikesejekadikuduju.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/a614d31b9ccdca33c0559659501d26d7/63062194967.pdfIn PDF document text
    • https://fanaf.comarticle_ressources/file/74789988924.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/175mi91soavvuqn005huv2ibr4/rijekoratisudanuboxexe.pdfIn PDF document text
    • http://klaaswester.nl/img/file/wagisigivonidu.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d23fe19f67e---xawetari.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=download+game+ultraman+orb+mod+apk+versi+terbaruPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1