Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a5d377914089625…

MALICIOUS

PDF

104.0 KB Created: 2021-08-13 08:04:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 30f7a84ad3629df902f0987cae9eafe8 SHA-1: e3fc38d986376ea5cbf105155736fb2b7de06181 SHA-256: 5a5d3779140896252dd70df65ba252d861f9e75cc3214254d2dbe21f5e136c74
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites or disposable domains. This structure is commonly used to distribute phishing content or redirect users to malicious sites. ClamAV detection further supports its malicious classification as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3945

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://smith-williamssisters.com/clients/d/dd/dd6cbc7353a6ef31c13ccaa63ab862ac/File/88625893649.pdf In PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/hiqhatt69e72pe4s87dfgm7qv1/39604023666.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/ef365a1a7bdb396caa0067b1c86f832e/rikugapofadevug.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d54783b9f23---63153586944.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16083d60a8cafc---82579648705.pdfIn PDF document text
    • http://kirakuramen.com/uploads/files/maxux.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160abf11eccbaf---19817669754.pdfIn PDF document text
    • http://sooclose.eu/upload/File/84298637136.pdfIn PDF document text
    • http://carrozzeriabosini.net/userfiles/files/fipexuzeji.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/n0r8eo0bb5dulgm2n5p2cijsts/77102757614.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc235af716---77857163686.pdfIn PDF document text
    • https://aonetreks.com/uploads/file/katotalisekenusi.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/359hjqnb6napi2mrfnvoieeji9/safenifolawesol.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16082da7b658ec---geragedipazeb.pdfIn PDF document text
    • http://qzgj.cn/upload/file/63020856251.pdfIn PDF document text
    • https://nabijdefossa.nl/upload/files/veforu.pdfIn PDF document text
    • https://istanajpdua.com/contents//files/kavaradowegujitageso.pdfIn PDF document text
    • http://jcbcharpentebois.com/ressource/site-image/files/82485615007.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/1puldi5uo9dsap83p1pgjmiv80/28349291523.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082739b7d003---22356823112.pdfIn PDF document text
    • https://fleuriste79.fr/ckfinder/userfiles/files/9807222765.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/2ee2f0424e745f830cd3fd478d9eb373/nofodulugun.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5adf3b708d---45737031788.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/pe9ei7riiaklamvtb3mu9gqnb3/jevufalatikepato.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=leyenda+guanina+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15318 10312 bytes
SHA-256: 38c1763c0c163b6c5f00b42a6ee0aabd1c5f3dfa33718ab48df0e2ac2777a24a
font_01_sfnt_off00016a3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1