Malicious PDF — malware analysis report

Static analysis result for SHA-256 7117995d7e977ce0…

MALICIOUS

PDF

41.5 KB Created: 2021-09-28 03:50:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: fa9eba64a67c04b781f2d2efea65728d SHA-1: cfc8949f9bc48fdb3cfec8e20c1d661c68de4804 SHA-256: 7117995d7e977ce02bce48ee80e8e9c46b9abaef317b6cc6e3f1d16888be6f6c
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document is identified as a phishing lure due to its structure, which consists primarily of an image designed to trick users into clicking a link. Multiple heuristics indicate it's a link farm hosted on compromised CMS platforms and disposable domains, aiming to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6714

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 41 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://www.firstpages.eu/app/webroot/files/userfiles/files/68439804287.pdf In PDF document text
    • https://lucky-erotic-massage-bucharest.ro/ckfinder/userfiles/files/jabazexedujopefak.pdfIn PDF document text
    • http://zjnep.com/ckeditor/ckfinder/userfiles/files/xudiji.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1613f501a52ad6---91882311320.pdfIn PDF document text
    • http://bortran.com/upload/image/file/20210916063548.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/tasudukijirezizemenul.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/10b8082270d9543e829eb6ac41b68df1/21764770319.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/luvopaniwovukidej.pdfIn PDF document text
    • http://yuhenganquan.com/userfiles/file/20210917035005_1469405217.pdfIn PDF document text
    • http://mail.me.ntou.edu.tw/ckfinder/userfiles/files/20210906_120552.pdfIn PDF document text
    • http://ordineveterinarivenezia.eu/userfiles/files/93139174419.pdfIn PDF document text
    • http://tunapvietnam.thietbiotoviet.com/Images_upload/files/fivoduleri.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16135cb3a5655b---12277736273.pdfIn PDF document text
    • https://poojaindiangrill.com/nbloom/fckuploads/file/vegofimusisaxes.pdfIn PDF document text
    • https://ip-kamera-rendszer.nuttydog.hu/ckfinder/userfiles/files/66338077645.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/161488e55ae234---26127359894.pdfIn PDF document text
    • http://kxqcgs.net/filespath/files/20210920121520.pdfIn PDF document text
    • http://harryreichert.de/uploaded_pics/News/file/55513945981.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/eefb83355b8978103394e70ae7b83f19/nufof.pdfIn PDF document text
    • http://ecofincas.net/ckfinder/userfiles/files/difelugujemude.pdfIn PDF document text
    • https://dhins.com/testingsites/advantage_aviation/assets/media/file/sinitulopavov.pdfIn PDF document text
    • http://373113.linker.tw/files/lewokukenivixataxi.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ccbae4662b---wojut.pdfIn PDF document text
    • http://enjoy.sk/editor_uploads/system/files/lavuk.pdfIn PDF document text
    • http://telektrans.hu/editor_up/zavefub.pdfIn PDF document text
    • https://ceccargiurgiu.ro/userfiles/file/fikeza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=usb+drivers+for+samsung+mobile+phonesPDF link annotation

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