Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc065b4f0f159310…

MALICIOUS

PDF

39.0 KB Created: 2021-10-02 16:42:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 1df63c84a4878ddd6608e31d0665ef09 SHA-1: c7345d7047018863977fbc07661bbcbbc4c18094 SHA-256: dc065b4f0f159310d74186fc69f06d179ae48191effd572eb402bbfab58a6fbb
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size, image-heavy content, and embedded clickable action. The heuristic 'PDF_IMAGE_LURE' indicates a common tactic where a screenshot is used to hide a malicious link. The embedded URLs, such as 'https://synerhu.ru/uplcv?utm_term=naughty+good+morning+text', are likely used to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7342

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://synerhu.ru/uplcv?utm_term=naughty+good+morning+text PDF link annotation
    • https://optimumquestsolutions.com/ckfinder/userfiles/files/35690908220.pdfIn PDF document text
    • https://artgallery.devctn.com/ckfinder/userfiles/files/guwobiwigexedegenimog.pdfIn PDF document text
    • http://kruengrangthai.com/files/files/dadomepetutisowogasikoral.pdfIn PDF document text
    • http://nyt.jp/p_images/resource_library/file/66380135836.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/34985553140.pdfIn PDF document text
    • http://xn--2-140-swe8h.xn--p1ai/files/nunadejegidevawiludafesi.pdfIn PDF document text
    • https://ariaparvaz.com/basefile/ariaparvazcom/files/15252573649.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615573e933ae0---wipibepuwuke.pdfIn PDF document text
    • http://vinmexindia.com/uploads/sotobopixemu.pdfIn PDF document text
    • http://lexen.ca/userfiles/files/82259104998.pdfIn PDF document text
    • http://watchimport.eu/userfiles/file/litidolugi.pdfIn PDF document text
    • http://luxmeterthai.com/ckfinder/userfiles/files/zumujomiwazezor.pdfIn PDF document text

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