Malicious PDF — malware analysis report

Static analysis result for SHA-256 79ec5309f6ec341e…

MALICIOUS

PDF

57.6 KB Created: 2021-09-09 04:59:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ab6fdc69a4e03626a95ed9c067795d45 SHA-1: fd61ea271b4bf4a0127fdb368cb3be96f7a1e79a SHA-256: 79ec5309f6ec341e9bd396f048e93dc096009420b5da1a8ff6232bf503ea29d1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed for malicious redirection. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7273

Heuristics 5

  • 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.
  • 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://mannerfeltdesignteam.se/ckfinder/userfiles/files/mapuduxuzatimeti.pdf In PDF document text
    • http://arsvet.ru/img/upload/pawunuv.pdfIn PDF document text
    • http://osteriailgalloelinnamorata.com/userfiles/files/jezenixeveripurobosas.pdfIn PDF document text
    • https://www.asoriofrio.org/ckfinder/userfiles/files/sexofokomi.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613767050ddb5---476309144.pdfIn PDF document text
    • https://thegioibaobicarton.com/Images_upload/files/42862776264.pdfIn PDF document text
    • http://vpsystem.com/files/fck/86712522448.pdfIn PDF document text
    • https://korovin.org/site/img_ufiles/8497355297.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4e2ca5ed6---kijolezolaxibumenepogem.pdfIn PDF document text
    • http://vlajkylevne.cz/UserFiles/File/17236296534.pdfIn PDF document text
    • http://uniroll.pl/user_images/file/5419549767.pdfIn PDF document text
    • https://behagi.eus/files/galeria/files/zanubokujuw.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/4653214c7a87bf07dfdde8ed8c6e4029/7701948313.pdfIn PDF document text
    • https://afra24.com/basefile/afra24/files/21686893845.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/2288865508.pdfIn PDF document text
    • https://transdeliveris.lt/userfiles/file/77724776583.pdfIn PDF document text
    • https://mabuksusu.com/contents/files/7872279542.pdfIn PDF document text
    • https://cashcruis.ru/wp-content/plugins/super-forms/uploads/php/files/2974ae7931a9d5dab0a5e5807dfb3f0a/54620141728.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/jitejalepetowidoxej.pdfIn PDF document text
    • http://alisawedding.com/upload/users/files/luwirenadumijewojirofebab.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/a80d2e8c2aa3f28094d0012d4b810855/pesozofaxolitolid.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=science+10+module+1+answer+keyPDF link annotation

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