Malicious PDF — malware analysis report

Static analysis result for SHA-256 51459fcb44cbfeb3…

MALICIOUS

PDF

41.4 KB Created: 2021-07-21 07:00:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4faf7e9df5497fbd159317adb76822e5 SHA-1: e66ffae4af7ab01e107b84614215a5aecb2a691f SHA-256: 51459fcb44cbfeb385cbc38d11212f21f976e61d3348b58d4e0a3effc0a8b529
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, suggesting an attempt to redirect users to malicious sites. The document's structure and small size are typical for an image-based lure designed to trick users into clicking through to a harmful destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7209

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 41 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 http://calebdobe.com/clients/875189/File/51657464773.pdf In PDF document text
    • http://evopizza.lt/ckfinder/userfiles/files/86373400406.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16084c44b35129---67039100808.pdfIn PDF document text
    • http://bonapartefamilynetwork.com/clients/7/7d/7d081654635712149502d88e72c54c2d/File/kuwopurajosegufobi.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/7gd90a5031oro7fftjsgrunvp1/28674872143.pdfIn PDF document text
    • http://massintech.ru/img/outer/files/51148008319.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/laligutufikirokokedixezuk.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854d0346504---motufeleposamazumijifama.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160773843935b9---mizakinimobedigofesubolix.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/dmi1r7q9larrf1vof8m9eaitvs/lusuretifinegowere.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7c8db1b5d---15558140832.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///28461157421.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd57f9170a---kozijuwore.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/14a3bc643eeca5fbb116fc16ab19b725/lakowebebonugukaboxi.pdfIn PDF document text
    • http://urparitet.ru/admin/ckfinder/userfiles/files/muvajarir.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/lugatix.pdfIn PDF document text
    • http://bigcool.net/webroot/img/files/48671442076.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/a8278cbe4fcc8fccc8df5128c3d12d68/71655966872.pdfIn PDF document text
    • http://hillsdale66ersreunion.com/clients/c/c6/c679c52642bc64dd8629b98fb95ccc77/File/53026320040.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/b45482babf2070e89148da80998adf6e/66484706657.pdfIn PDF document text
    • http://hookmyweddingup.net/clients/73542/File/xemepugiwojugodakofa.pdfIn PDF document text
    • https://hocaukhudothithanhphogiaoluu.com/asset/site/files/vovovo.pdfIn PDF document text
    • http://hungthanhauto.com/luutru/files/jekowekozipumejejufopoxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=types+of+business+entities+and+their+characteristicsPDF link annotation

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