Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a80cfffa2af1be3…

MALICIOUS

PDF

50.4 KB Created: 2021-09-11 19:50:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b37983986751f7cb9ed6ae32960df93c SHA-1: f9dee2e262fdab30601cf52ebd69e2f5f9aa2927 SHA-256: 0a80cfffa2af1be302351192dcf253698bab2bb8be8b9a6855e7f96e57ce102a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection further support its malicious nature, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6227

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://laborke.ru/uplcv?utm_term=apk+editor+pro+free+download+latest+version PDF link annotation
    • http://hockjoohin.com/admin/uploads/file/xagulabukafewojoxenujuf.pdfIn PDF document text
    • http://julianina.de/upload/file/kumamom.pdfIn PDF document text
    • http://uniquehotelsolutions.com/files/others/66122518167.pdfIn PDF document text
    • https://superpart.com/files/xajarebawaguti.pdfIn PDF document text
    • http://kor-ra.ru/UserFiles/file/nojalililipivanoxupusi.pdfIn PDF document text
    • http://market-oborudovanie.ru/upload/file/fenopepoxosamaxupot.pdfIn PDF document text
    • https://thegmsbihta.in/userfiles/file/nasobojijodejepigugile.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/cbeb66bf89275359e6625af055640cb8/4261778624.pdfIn PDF document text
    • http://winso.tw/userfiles/file/92748733625.pdfIn PDF document text
    • http://alisawedding.com/upload/users/files/80433573000.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/19847423633.pdfIn PDF document text
    • https://pre-www.bridge-academy.com/uploaded/ckeditor/files/9492222457.pdfIn PDF document text
    • http://fli.edu.mn/ckfinder/userfiles/files/tazugezejemomasefowaw.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/73613914195.pdfIn PDF document text
    • http://firegallery.ru/img/upload/majamujusod.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131aee62535f---wawojaritiwasafekojumiv.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/rujegijasigokisoruwev.pdfIn PDF document text
    • http://xn--80affcyoc0ac1f6a.xn--p1ai/admin/modules/ckeditor/ckfinder/userfiles/files/fuwabedi.pdfIn PDF document text
    • http://flapboxes.com/userfiles/files/kipive.pdfIn PDF document text
    • http://huyminhplastic.com/upload/files/94372904524.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613c4d052cd27---80366432839.pdfIn PDF document text
    • http://kemenyseprosiklos.hu/upload/file/92730708138.pdfIn PDF document text
    • http://mbjarrahi.com/UploadedFiles/New/file/44720715828.pdfIn PDF document text

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