Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c6f43876cec5831…

MALICIOUS

PDF

45.6 KB Created: 2021-09-21 05:49:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 50831f2bbd585084532d53379262451a SHA-1: 1157077105aa20ee92b15f0fb2401ac844254644 SHA-256: 6c6f43876cec5831f485b36a5f1ab2a5b6aaebc62d101169fe92287c31833fcb
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution lure. It functions as a link farm, embedding numerous URLs that point to potentially compromised websites or disposable hosting, designed to redirect users to malicious content. The presence of external URIs and link farm heuristics strongly suggests an attempt to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7407

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://drafthe.ru/uplcv?utm_term=price+of+redmi+note+9s+in+bangladesh PDF link annotation
    • https://udruga-invalida.hr/files/47601624924.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ce10dd445c---busexeveniwuketasisizo.pdfIn PDF document text
    • https://bevasilicones.in/userfiles/file/16545470917.pdfIn PDF document text
    • https://avukat.dnsaktif.net/upload/files/14677106498.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/2670635f7ebee5a423266273329e761e/89467182380.pdfIn PDF document text
    • http://www.prctech-th.com/ckfinder/userfiles/files/65369788822.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16143186698962---roganizuwixujup.pdfIn PDF document text
    • https://www.luxboss.com/ckfinder/userfiles/files/95614666726.pdfIn PDF document text
    • https://www.zolmedis.lt/ckfinder/userfiles/files/65833353131.pdfIn PDF document text
    • http://mkbeauty.vn/luutru/files/76272602028.pdfIn PDF document text
    • https://huuphongplastic.vn/uploads/images/files/wemebetamebowivolexo.pdfIn PDF document text
    • http://rzn-house.ru/upload/file/42903167636.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/47692132212.pdfIn PDF document text
    • http://twapp.freshkon.com/upload/files/busaniwije.pdfIn PDF document text
    • http://musiclivemarsala.com/userfiles/files/jetupazikufelokozibenebew.pdfIn PDF document text
    • https://www.blondel-bois.fr/ckfinder/userfiles/files/veluzapodubananopa.pdfIn PDF document text
    • http://emons-verlag.net/testarea/cwsCMSlight/media/files/59346317102.pdfIn PDF document text
    • https://robustbrakes.com/administrator/imagetemp/file/48387515813.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/16147ab6f1b7b2---kipojojevonodufufovapad.pdfIn PDF document text
    • http://bigbazar.cz/is/images/FCKeditor/File/65916059957.pdfIn PDF document text
    • http://toyotarent.hk/FileData/ckfinder/files/20210917_5B3186503AC7B284.pdfIn PDF document text
    • https://digireg.cz/upload/94590476903.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/28714879948.pdfIn PDF document text

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