Malicious PDF — malware analysis report

Static analysis result for SHA-256 b27e236cf78c425f…

MALICIOUS

PDF

59.7 KB Created: 2021-05-04 07:54:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 874fb1173a762a115d7fad46f545414e SHA-1: 56374f61282345ed78b4231544d396e6cf282704 SHA-256: b27e236cf78c425f599b0730a0148b1af32015eb025635604d254820e27ac611
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as a link farm, with several URLs pointing to compromised WordPress sites. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. The document body contains garbled text, suggesting it is not intended for human consumption but rather to host links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7144

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/nn6jr343nbtkn85h6et1dprrtf/6184289618.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086eedfd530e---93482609757.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160707a73f12e3---9672147602.pdf
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/2b2f4f7be43d78830a2326dc6b27057b/58001909448.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/13ab3eb5bc3d4d4289336600270feb55/vaporazakarubenoxupix.pdf
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160727ab8adfd6---97697505385.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/mqbg5prlothm4uevvb1ovm9hbq/zewadej.pdf
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608955706e08c---luvowiforaregat.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee83d902a7---19879496854.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/d6daf43d4bb93e3257a7e0e65512bd54/niteruvajatuworerew.pdf
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/5v2dfs38pihgolp0ecdkalkvr1/bigoleko.pdf
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/a77210dccba063388d451ad6795ecda7/gowaperav.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6ad99d2fb---53818424512.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/a27a48a093a5218846ed297be57bb243/rezigifob.pdf
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/e9a6b8994e3d65dac5540f91f2b00cb4/kadiruzana.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160707f824b1b7---nikaxuwegebiwamuleseg.pdf
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/878baadc4aec36844d3daa559060a495/tekoxawavasepetinafup.pdf
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/8d3fc9b8b316b08032c2fe9e22dacc65/jitipizoko.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=aha+guidelines+antiplatelet+therapy

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