Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c7e6d60e9af03e7…

MALICIOUS

PDF

41.5 KB Created: 2021-07-07 07:52:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 3a57ff92c10ed257566ebec011cb3b30 SHA-1: 11198f25713510725edfe2318bbae173ecb0eab2 SHA-256: 5c7e6d60e9af03e7a764cd6e5983324286920014674f67aa9561f9219098c56c
114 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7328

Heuristics 5

  • 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 https://eqonetech.com/upload/userfiles/files/fanulewolufegibumeper.pdf In PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/34ed3b7e23b40cd4bff8122a636a19e7/pupisopim.pdfIn PDF document text
    • https://elnativocoffee.com/silver/upload/files/mesisubizuwo.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/43740753001.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/12326507686.pdfIn PDF document text
    • http://markone-tools.com/upload/files/ledigekupurapig.pdfIn PDF document text
    • http://eco-versute.com/app/webroot/ckfinder/userfiles/files/69558222022.pdfIn PDF document text
    • https://jagominum.com/contents//files/dadezawirokikegideluxuxo.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7548630bce---8998796747.pdfIn PDF document text
    • http://jump360.co/upload/files/20210604135254.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/minuj.pdfIn PDF document text
    • https://erdenetpost.mn/userfiles/files/65439414933.pdfIn PDF document text
    • http://bielle-srl.com/userfiles/files/77608996788.pdfIn PDF document text
    • https://baigiangtoanhoc.com/upload/files/rabodesal.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/2021510132576089.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/9f1f93597543d7da5821eff2f7f1283a/rowatumafuzet.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0ad024701---64104766557.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16079f71cd1043---wofivibomenibipidedozijo.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c89abd7782d---toneluxujadisewat.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/kubadapimunexadeja.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9fd36d859---93944894635.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=php+and+mysql+interview+questions+and+answers+for+freshersPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/a46192e473d909cdfd010565dfa49f49/garasasurupujevulajata.pdfIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

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