Malicious PDF — malware analysis report

Static analysis result for SHA-256 76aa71c0012cb037…

MALICIOUS

PDF

39.0 KB Created: 2021-09-22 12:27:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 58f92625b2b725434a694df3c741088b SHA-1: abed51bc3e1e98b6babc9002dff86d9a070a7693 SHA-256: 76aa71c0012cb0377eee01cde6e4dbc55fd21eb2fb86e49983b3e62add92c6a4
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is structured as an image-only document with a clickable action, typical of phishing lures. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a compromised site for further exploitation. The document body is heavily obfuscated and unreadable, but the presence of JavaScript and the overall structure point to a malicious downloader or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8579

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 38 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://halongbaycruises.org/upload/files/bizisoz.pdf In PDF document text
    • https://agri-mal.pl/userfiles/file/29922603239.pdfIn PDF document text
    • https://network-italia.it/file/85762941415.pdfIn PDF document text
    • http://hakasasi.id/userfiles/file/vitunure.pdfIn PDF document text
    • https://chatsystem.site/js/ckfinder/userfiles/files/kodepozazaginizonos.pdfIn PDF document text
    • http://tjjjsh.com/uploads/files/18390571499.pdfIn PDF document text
    • http://karaokejdi.com/ckfinder/core/connector/php/upload/files/64833187295.pdfIn PDF document text
    • https://srilangkapools.com/contents/files/radezukomiva.pdfIn PDF document text
    • https://bedandbreakfastholten.nl/userfiles/file/6746444551.pdfIn PDF document text
    • http://trans-serwis.com/userfiles/file/65675419865.pdfIn PDF document text
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pitinofab.pdfIn PDF document text
    • https://inprovitcentroamerica.com/ckfinder/userfiles/files/61260469688.pdfIn PDF document text
    • http://foto-preiss.at/upload_files/files/65133429353.pdfIn PDF document text
    • http://innova-perila.ru/upload/files/83395261354.pdfIn PDF document text
    • http://www.dkmodels.net/ckfinder/userfiles/files/68728461122.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614685fd2c322---xawifigoronuvininilufajo.pdfIn PDF document text
    • http://mikailang.net/userfiIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=mastering+pytorch+pdfPDF link annotation

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