Malicious PDF — malware analysis report

Static analysis result for SHA-256 875d5715a01dc891…

MALICIOUS

PDF

65.4 KB Created: 2021-07-29 23:08:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: dcb7f1740d48c96c827b317627deaf57 SHA-1: 692a6daf3d87e0f999dc6ae36568c2c3b45a12cf SHA-256: 875d5715a01dc891ae51637c0772d3c8f1d9f0a7f37b6910b308954ac2f369a7
154 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to compromised WordPress upload directories. These links are likely intended to lure users into downloading further malicious content or visiting phishing sites. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7791

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://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/db15300efacb03610222736a2a4cf06f/1588498923.pdf In PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef4f5ac970---96463028653.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/jadejizafebosetulinakejum.pdfIn PDF document text
    • https://innotek.vn/uploads/news_file/49490845720.pdfIn PDF document text
    • https://aneri12.eu/res/file/bilika.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bac28dd79de---45731043369.pdfIn PDF document text
    • https://sayurhijau.com/contents//files/40100621604.pdfIn PDF document text
    • http://21cedu.com/pds/userfiles/files/gekoletoti.pdfIn PDF document text
    • http://olgapolyakova.com/files/files/titorubefezopasexudu.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2508fb2358---27567277187.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ebfea7724---remapijipakafix.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///13761043801.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce580ab8b9---lutosorugipi.pdfIn PDF document text
    • https://saunadlaciebie.pl/userfiles/file/sijokunepovebinajevogig.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/84fdbb68be1bc99e0e12deb6a7145f8e/bexafu.pdfIn PDF document text
    • http://www.malagatour.es/ckfinder/userfiles/files/42933384510.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1608f785e86716---40909103865.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/3256ee27300e8f161e8a4d55bf5518f8/xorakafebapisunow.pdfIn PDF document text
    • http://iweldbot.com/ckfinder/pho/files/datadidejotamotuwozuk.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/4dtd51g6uvkp4i9k87idmups5q/seziloputazad.pdfIn PDF document text
    • https://menu2uplus.com/images/file/6391390547.pdfIn PDF document text
    • https://pcparts.fr/ckfinder/userfiles/files/57406354269.pdfIn PDF document text
    • http://solarhomepage.ch/fckeditor/editor/images/file/88396582739.pdfIn PDF document text
    • http://jinshi66.com/uploadfiles/files/16274249640.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/c3sgh6se2o62nt40l2t2j9inv0/33911751995.pdfIn PDF document text
    • http://15fratrowreunion.com/clients/2/2b/2b18ccadde375fd95e9ac2d5db5aaa67/File/49166746593.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=nouvelle+liste+des+chaines+canalsat+pdfPDF link annotation

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