Malicious PDF — malware analysis report

Static analysis result for SHA-256 a357481402dfc714…

MALICIOUS

PDF

39.8 KB Created: 2021-10-07 19:26:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: bfac84e83dd6ddd167c1f76c3ddc7272 SHA-1: 3a4a54ac6c9020986b451bb040d0f5627aa426c4 SHA-256: a357481402dfc71427bfb34175207bbb047b255a56f1341eb9808e8310a995ca
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, presenting itself as an image-only document with a clickable action trigger. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting an attempt to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9743

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 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 http://czechdidgeridoo.com/admin/upload/file/sutulasukikupi.pdf In PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/800c2f6b0cff7af02574e6d8b9aac29b/sorosepuvokedido.pdfIn PDF document text
    • https://mahanakhon.pacedev.com/ckupload/files/18346927114.pdfIn PDF document text
    • https://lorus.rs/files/repabutezewutimige.pdfIn PDF document text
    • https://sapporomn.com/userfiles/files/fikuvivoxevuxuzujobizim.pdfIn PDF document text
    • https://www.poeles-granules-vasconha.fr/ckfinder/userfiles/files/54680298819.pdfIn PDF document text
    • https://ietc-oman.com/userfiles/files/47331026195.pdfIn PDF document text
    • https://ms02bet.com/contents/files/52736232575.pdfIn PDF document text
    • https://markiza-trade.ru/admin/ckfinder/userfiles/files/94104501583.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/161383d1b312f9---77846490289.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f6ba35745b---75487425608.pdfIn PDF document text
    • http://dyneco.kr/userData/board/file/88052612864.pdfIn PDF document text
    • http://phutungquanghieu.com/app/webroot/files/ckfinder/files/35105275193.pdfIn PDF document text
    • http://3xlove.com/uploadfile/file/wogavaxapus.pdfIn PDF document text
    • http://theofficefurniturestore.com/ckfinder/userfiles/files/73690655029.pdfIn PDF document text
    • http://traktor-tv.de/sites/default/files/file/tepudaxuv.pdfIn PDF document text
    • http://hotelpenza58.ru/ckfinder/userfiles/files/zekanezinodor.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1614b6fc61424d---zuxixolubilabovuvorexox.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/7b6ce97efb366e5a5d558aa051d402ca/51658757958.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=chapter+35+electric+circuits+answersPDF link annotation

Open this report in the interactive analyzer, or submit your own file for analysis.