Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3318435bfade4e2…

MALICIOUS

PDF

48.0 KB Created: 2021-09-04 13:36:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f9c7754b7205f5c16d9dd2ae6af5ad21 SHA-1: fdddfebae040890ca4bc847f78589e3fd4e4e789 SHA-256: a3318435bfade4e2ff4fb01f3630edf113ac405a781a5d0a1f5745e2dfc56996
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier's high score strongly suggest malicious intent. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' further supports this, pointing towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6468

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://wastran.ru/uplcv?utm_term=salmonella+pdf+unam PDF link annotation
    • https://calmoinc.com/upload/editor/file/23504935452.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16092701d8eaa1---33247032717.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/biifr3mig3d5o23qt8l23qcc3p/dowewef.pdfIn PDF document text
    • https://girl0229960192.com/upload/users/files/momesi.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/54957141968.pdfIn PDF document text
    • http://enidental.com/userfiles/file/20210817105433.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/41423449609.pdfIn PDF document text
    • http://agrocare.hu/ckfinder/userfiles/files/5788901345.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/74ab47bc550e56b060fa0069a49b9e87/rumipevegilupe.pdfIn PDF document text
    • http://aryajob.com/user_upload/file/zigeberisitegupowedopobof.pdfIn PDF document text
    • http://canevinclassof70.com/clients/6/6b/6b8b8ee0d314e59372afbcb75100d768/File/80630089407.pdfIn PDF document text
    • http://netpost.vn/upload/userfiles/files/xawajitojigezotug.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/a00954df5997ac56b073cb3e2ec0753a/lulob.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607d211b6d2e5---30278274962.pdfIn PDF document text
    • http://luluscafeonline.com/uploads/files/kojoromilizifumilut.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/r2ebn4ie61ggfnaa62i6qkfc6n/33754502619.pdfIn PDF document text
    • http://zezoalza.com/ckupload/files/gutakabipurazezowuzufokam.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af8886bb289---80585891057.pdfIn PDF document text
    • http://bendhigh1970.com/clients/1/10/106e6567aa8bd3cecf4080670b11bd10/File/juriwomamo.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1608dfcae9d390---famerosigopud.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/76137989fa80837373f29b0feadf0c32/mamuluxotaxivenedove.pdfIn PDF document text
    • http://eotp.info/sites/default/files/fck/file/45387371110.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160965dedbfb20---dipabakujumed.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/dcb11b3150e5cfb006610a5111854b07/sefesuzizivawumul.pdfIn PDF document text
    • http://raisemoneyonline.org/clients/6/69/691275cf9a36cab982b2498ebdc715be/File/jisezixumapakinobapepupu.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b5f8aaac226---8134480661.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/samazewejarefe.pdfIn PDF document text