Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec906f660c2a676f…

MALICIOUS

PDF

53.8 KB Created: 2021-09-13 12:11:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 02f2e0bbb152916bd6f76d69c92aa89f SHA-1: 73366aa85276414275730f17b8c198f757b8c4ab SHA-256: ec906f660c2a676fa72740fa5206ba01f7a6f99768a5e673d72c8e7734641a6d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that form a link farm, with several pointing to compromised WordPress sites and disposable hosting. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. The presence of these links suggests the document is designed to lure users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6253

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://nomortiga.com/contents/files/52304974131.pdf In PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/92266287002.pdfIn PDF document text
    • https://pristineleather.com/userfiles/file/vajapiloko.pdfIn PDF document text
    • http://okun.su/upload/file/fedezexigilipanileja.pdfIn PDF document text
    • http://wpklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/83189628147.pdfIn PDF document text
    • https://bellcera.60km.com/upload/files/dadusikemamafiwamataxot.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/cgop4221vp2p93cpn2u82id43j/tosezek.pdfIn PDF document text
    • http://birdwatching.sk/media/file/67717481881.pdfIn PDF document text
    • http://sswjeans.com/files/17906712315.pdfIn PDF document text
    • http://www.oomewatersport.nl/upload/files/55935104173.pdfIn PDF document text
    • http://musiclivemarsala.com/userfiles/files/64697964769.pdfIn PDF document text
    • https://namhunglogistic.vn/site/files/lufokipowapipufit.pdfIn PDF document text
    • http://hiredriver.com/uploads/assets/files/sopeda.pdfIn PDF document text
    • https://associazionemusicaviva.it/uploads/file/77910747538.pdfIn PDF document text
    • http://turchifiltri.com/userfiles/files/ditujimogi.pdfIn PDF document text
    • https://arbormaster.net/uploads/files/799915697.pdfIn PDF document text
    • http://delta-serwis.pl/pliki/jegovaziris.pdfIn PDF document text
    • http://ttccid.com/userfiles/file/mezuwowiwomoj.pdfIn PDF document text
    • https://barrierball.cl/ckfinder/userfiles/files/tifoweji.pdfIn PDF document text
    • http://theurbanbazzaar.com/userfiles/file/48367095624.pdfIn PDF document text
    • http://savages.lu/imagesRTE/files/xutizagafupuj.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613587961882f---zazepoxuvekomemabum.pdfIn PDF document text
    • http://darangyi.com/userData/board/file/zufexodero.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/7c9c74afe4b13a6ebc747b1dbd3a58dc/mopakexosav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=turn+android+into+bluetooth+keyboardPDF link annotation

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