Malicious PDF — malware analysis report

Static analysis result for SHA-256 85239a541139e91a…

MALICIOUS

PDF

60.9 KB Created: 2021-09-13 08:50:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7694bee6b555b66262208115d91d8129 SHA-1: 409ea31ead1679bebb45e9c95c5a0952a8dba93a SHA-256: 85239a541139e91ab6ebdc8c3bf1fb945f19a9c73c4e612cbacc7b7167947a28
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are hosted on disposable domains or compromised CMS uploads. This indicates an attempt to redirect users to malicious sites, likely for phishing or malware distribution. The ClamAV detection further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3485

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://medvor.ru/uplcv?utm_term=free+best+video+editor+for+android
    • http://meghdoothsuzuki.com/uploads/konenisim.pdf
    • https://fetogram.ir/images/upload/files/nugidetaji.pdf
    • http://domplus.su/userfiles/files/97487437679.pdf
    • http://vnndt.com/Images_upload/files/83146091074.pdf
    • https://wfca-czech.cz/temp/userfiles/files/15969446686.pdf
    • http://haiannweb.com/uploads/files/gewor.pdf
    • http://women-for-marriage.com/ckfinder/userfiles/files/lurimaxekenoduxir.pdf
    • http://www.swaving-stalinrichting.nl/ckfinder/userfiles/files/xarirosizapewuli.pdf
    • http://lasantitosrestaurant.com/userfiles/file/91951770425.pdf
    • http://stroykap.com/application/views/stroykap/userfiles/file/11052220212.pdf
    • http://oshcongregation.com/userfiles/file/32730973309.pdf
    • http://chickendaylacrescenta.com/uploads/files/buxasokof.pdf
    • https://codefon.hu/js/ckfinder/userfiles/files/xugoje.pdf
    • http://at2apigroup3.com/contents/files/95637353122.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d156ea77bf---volodivodapev.pdf
    • http://hotelrefah4ter.ir/basefile/hotelrefah4terir/files/fajige.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/1708b6d1b0e8f4fde343744a4425ca50/91751648582.pdf
    • https://sintasyapi.com/img/userfiles/file/nitafezeram.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/hmn0k9hml9046kfkh8mjqa4gs2/bubako.pdf
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/161341e6dc8e8b---golarixokerunulokutopaf.pdf
    • http://shijijiaming.net/filespath/files/20210909053657.pdf
    • http://exms.fr/sites/default/files/file/sobixe.pdf
    • https://www.syria-report.com/sites/all/libraries/ckfinder/userfiles/files/92206407038.pdf
    • http://fine-cottage.ru/userfiles/file/44919782425.pdf
    • https://vleek.com/uploads/files/42454073976.pdf
    • https://etravelbox.com/scgtest/team-explore/uploads/files/71314901163.pdf

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