Malicious PDF — malware analysis report

Static analysis result for SHA-256 35b59d02910faa24…

MALICIOUS

PDF

49.8 KB Created: 2021-09-25 19:45:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: eaf2f575f7da667fd09b9438b97a323f SHA-1: c5d416cd0f6a7cac0426f3f842a9261f78505cb6 SHA-256: 35b59d02910faa245a5cabb8c8a47e0310916239db5bd80b180e4306feb5ff10
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised CMS upload directories, suggesting an attempt to host malicious files. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URLs strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6036

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://infotechsystemsonline.com/ital/www/img/file/84856819350.pdf In PDF document text
    • http://automsystem.com/UploadFile/file/20210916063433453.pdfIn PDF document text
    • http://jimsclub.net/new/board/img_tinfo/file/20210905054925.pdfIn PDF document text
    • http://ddgasul.com/userfiles/file/xafuxevobonawap.pdfIn PDF document text
    • http://taemyung.com/data/upload/file/mopoj.pdfIn PDF document text
    • http://chochosanencino.com/uploads/files/42299287829.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/161394ba875f97---gudekagugubadabobetegego.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/22378475423.pdfIn PDF document text
    • https://paardenwelzijnscheck.nl/app/webroot/files/ckeditor_files/files/kagofamaduto.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16134f4b8cb99d---gakugixit.pdfIn PDF document text
    • http://irk-yoga.ru/upload/files/zilijaruxotexeki.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161373ed9132d0---37983075756.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/goxidak.pdfIn PDF document text
    • https://hv2barrier.com/application/third_party/ckfinder/userfiles/files/nofusaronida.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/1aec0678da8829350980e09c89c91506/guzovidojewavam.pdfIn PDF document text
    • http://rund.cz/UserFiles/File/tofonupovobisafifexade.pdfIn PDF document text
    • http://xn----7sbndn5at.xn--p1ai/uploads/files/fogotapimevigatibis.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/161324c0d1c809---nudulawifuripijefiwupi.pdfIn PDF document text
    • http://szentdorottyapatika.hu/files/39539571711.pdfIn PDF document text
    • http://hftyby.com/upload_fck/file/2021-9-6/20210906150056136497.pdfIn PDF document text
    • https://mtestbd.com/assets/uploads/files/54215423429.pdfIn PDF document text
    • http://www.reeder.ee/files/filemanager/9065607770.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/8d1t9796u1gej2hk2qnansg440/lineviterim.pdfIn PDF document text
    • https://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/74186021220.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=game+earn+apkPDF link annotation

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