Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bdc72b54f9b8558…

MALICIOUS

PDF

51.2 KB Created: 2021-09-04 20:06:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 71c113b20e550347df8ad751468b25e8 SHA-1: b0cb6f92fab843b7b02f4ce80fea3b27e7ad6f88 SHA-256: 3bdc72b54f9b8558b9ab50a21b16f0632430ca08dc55ffc683d8e2604044c0f3
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. ClamAV detection and ML classification confirm its malicious nature. The presence of external URIs and link farms indicates a likely attempt to redirect users to malicious sites, potentially for exploitation or credential harvesting.

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://pistant.ru/uplcv?utm_term=zonare+z.one+manual PDF link annotation
    • http://barudan.hk/UploadFile/file/20210623044353967.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/kibodiravevekidazepolama.pdfIn PDF document text
    • http://train-in-japan.com/images/blog//file/19066041646.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/08e3d972257c8b4af4447e48a2e3657b/76946945403.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/9d674df71436ff2ab65d8ffe83a57d8d/befotomaximux.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b552ebbd7c2---6615955349.pdfIn PDF document text
    • http://ilkemymm.com/image/files/tebuvavovato.pdfIn PDF document text
    • http://zonwering-belgie.nl/ckfinder/userfiles/files/89267087909.pdfIn PDF document text
    • http://sheeld.org/clients/d/d0/d021426cee8527c21a172be12ef3d645/File/gijovupiwoxotewe.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/lua5rbsn44ahcvghs0ftk081f6/momejidobab.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b2fa5d043---77006027980.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/3b3df08cd0e64cb084f95fe304d5ca37/43402441748.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/1u6i55h66n06fe6ubthv21a3j7/94878077491.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/767b8a56140dfce31a7da0b81263f545/purajidutavonededezexe.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fda3f56573e---74820177698.pdfIn PDF document text
    • http://alanurturizm.com/rsm/files/26484019409.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612c65f03246d---61186582435.pdfIn PDF document text
    • http://yoshitomo-kokubunji.com/jcfiles/file/20562295853.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/malur.pdfIn PDF document text
    • http://norilskgu.ru/userfiles/file/xedagapejokov.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/kugt6ui1vcdbmi3eot07sk24a7/10637219881.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/370cea7d03dd7392a06c95a2953f6d83/kerisetefepakojaluliwubin.pdfIn PDF document text
    • http://sambometal.com/dataroom/file/76916912145.pdfIn PDF document text

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