Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f5b5d2b4cc61eb3…

MALICIOUS

PDF

41.5 KB Created: 2021-09-24 02:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9ff05ad50be505790fa7f12cdca366a7 SHA-1: a7e8ba69bb3037f671fd6b5ca32cce922a946032 SHA-256: 0f5b5d2b4cc61eb35957a6f57a48775dcc83433f4b9b4e279a954f64e06766c6
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external links, many hosted on compromised CMS upload directories or disposable domains. The document body is heavily obfuscated, but the heuristics indicate it's designed as an image-based lure, likely to trick users into clicking a link that leads to a phishing or malware download site. The embedded JavaScript and extensive link farm strongly suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7348

Heuristics 7

  • 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.
  • 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://oniceh.ru/uplcv?utm_term=guess+the+logo+level+3 PDF link annotation
    • http://eshop-kocicinadeje.cz/files/file/98620827457.pdfIn PDF document text
    • https://qpshouse.com/upload/image/file/77629413147.pdfIn PDF document text
    • http://kechengchem.com/upload/files/nezobivumelifaj.pdfIn PDF document text
    • http://firsttimehomebuyerstudy.com/images/file/nupunorilogapud.pdfIn PDF document text
    • http://wuyioutdoor.com/userfiles/file/253387254.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/92606321791.pdfIn PDF document text
    • http://lienming-rubber.com/uploads/files/202109042136217358.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b2f9e282ee---48281072549.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/ificpiomuu57oqsbm37it17hud/77347670110.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/voxaradutulutemetopixilox.pdfIn PDF document text
    • http://bscartridge.com/pic/60319675454.pdfIn PDF document text
    • http://ghefootmassage.com/fckeditor_userfiles/file/kapopapinenefasurafitazok.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/161475cd3d52b9---zevonakatenimagogepeda.pdfIn PDF document text
    • https://tahuacoop.com/cms_gpadmin2015/sgi_userfiles/userfiles/files/rosilefolawojapafotalokut.pdfIn PDF document text
    • http://vitacanes.com/uploads/files/63682039458.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/161302027719ad---nemakinox.pdfIn PDF document text
    • https://jsptti.com/ckeditor/ckfinder/userfiles/files/49793802791.pdfIn PDF document text
    • http://hennel.hu/sources/elemek/file/54999204997.pdfIn PDF document text
    • https://gameadvisers.com/js/new/fckeditor/userfiles/file/35550861178.pdfIn PDF document text
    • http://ymjgolf.com/file_media/file_image/file/dunipewexitesuzoga.pdfIn PDF document text
    • https://everestart.com/images/stories/file/37300549551.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/161404679bc07f---zomipapu.pdfIn PDF document text
    • https://gfwofficial.com/ck_imgs/files/gimopeviruluzelefogonuw.pdfIn PDF document text
    • http://hftyby.com/upload_fck/file/2021-9-3/20210903084739448030.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614040db4a518---96183205457.pdfIn PDF document text

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