Malicious PDF — malware analysis report

Static analysis result for SHA-256 77d9eba51551e06c…

MALICIOUS

PDF

48.4 KB Created: 2021-09-23 02:27:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: dd414b4100b07a8daaec0b2860a0f3e3 SHA-1: 80c619931cf44184b633b683a831e43bfd632101 SHA-256: 77d9eba51551e06c65f07b1ab2e48367b3211b8507a5fb2ca48134a95df7f2f1
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable or compromised domains, suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier further support its malicious nature, likely serving as a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8005

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://catamma.ru/uplcv?utm_term=where+to+watch+the+promising+young+woman PDF link annotation
    • http://katachizu.com/img/news/files/nitenedegofupedi.pdfIn PDF document text
    • http://ibsdhc.hpds.work/ecdemo/web/js/ckfinder/files/files/tiworojo.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210915220005389.pdfIn PDF document text
    • http://nanopena.cz/upload/file/15258496169.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/47018200949.pdfIn PDF document text
    • https://braindevelopmentmaps.org/userfiles/files/moxapov.pdfIn PDF document text
    • https://casabresciani.it/uploads/file/difurepugetubutunotek.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16141abb8ba84a---40821741022.pdfIn PDF document text
    • https://afmiletisim.com/resimler/files/niranedoxajojimoxepivag.pdfIn PDF document text
    • https://saikekanglun.com/filespath/files/20210901220056.pdfIn PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/71296871587.pdfIn PDF document text
    • http://sgd42.ru/userfiles/file/340464995.pdfIn PDF document text
    • http://immopolignano.lu/images/lavidojatu.pdfIn PDF document text
    • http://geopraxis.it/userfiles/files/22981780147.pdfIn PDF document text
    • http://cgl.lu/userfiles/files/51717568858.pdfIn PDF document text
    • http://shippingengineering.com/files/ckeditorothers/97105305097.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/wogoxoxupunanukisuwalesi.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/c89b06a3f6f010f1e848554b737d001b/mepixosebidirebapobojumuj.pdfIn PDF document text
    • http://carneslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/42772981043.pdfIn PDF document text
    • http://tsutae-f.com/js/upload/files/40749068133.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613da738167e3---rozogusurivin.pdfIn PDF document text
    • http://bosch-elektronarzedzia.pl/catalog/file/97980259173.pdfIn PDF document text
    • https://jagamimpi.com/contents/files/82793973897.pdfIn PDF document text
    • https://medicabg.com/uploads/wysiwyg/files/54690912079.pdfIn PDF document text

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