Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fb443e18c50ac5d…

MALICIOUS

PDF

39.9 KB Created: 2021-09-03 02:06:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 0064c5696acbca33d7a0aa2f7f9128b6 SHA-1: 3d4ebb2254bc134f9e093a7b1b78faadd9f21856 SHA-256: 9fb443e18c50ac5d52be5b1a38ce526d0d3cf40b41362e9b87682bd8dd505cb4
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file is identified as a phishing lure due to its structure, which presents an image to the user while hiding clickable links. The heuristics indicate it's an image-only document with an action trigger, typical of phishing scams. The numerous embedded URLs point to compromised websites, likely serving as landing pages for credential harvesting or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9743

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 39 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 https://smidgel.ru/uplcv?utm_term=line+graph+worksheets+for+class+5 PDF link annotation
    • http://gtlitalia.com/userfiles/files/91300595912.pdfIn PDF document text
    • http://www.lukoilmarine.com/ckfinder/userfiles/files/sowoxudadajadafivame.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160827179cd765---xajusurogak.pdfIn PDF document text
    • https://moolans.com/uploads/files/13524888075.pdfIn PDF document text
    • http://tensoinox.com/userfiles/files/foxapudowoxurofedorerigo.pdfIn PDF document text
    • http://1959blackshirts.com/clients/866684/File/86176316994.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/ar6vlim6ir9hh07bdv69f5d195/semovibiledufir.pdfIn PDF document text
    • http://dgone.kr/userfiles/file/20210830181351.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160f48c2d072bd---55510062694.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bd25c9fed124289660a26fbb32cb15e7/bufiwilolala.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d54802ff51---94735614684.pdfIn PDF document text
    • http://www.nomorcantikjoss.com/file/tujivu.pdfIn PDF document text
    • https://bimstudioinc.com/media/files/lidazikapokovinag.pdfIn PDF document text
    • http://bereanbaptistashton.com/clients/1/1c/1ca8668e480cca1e897b6add33210fc6/File/59174019400.pdfIn PDF document text
    • http://szpital-sulecin.pl/images/fckfiles/file/sinope.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/67e1aec8c29cbc0d5d948bb6410081f0/14621810150.pdfIn PDF document text
    • http://www.ecostroyservis.ru/File/xesizuwuwumeleredo.pdfIn PDF document text
    • http://weingut-suppan.at/files/28364567779.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16096b27e65672---kugifuzekufijixux.pdfIn PDF document text

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