Malicious PDF — malware analysis report

Static analysis result for SHA-256 1de3b0369daedaf9…

MALICIOUS

PDF

38.1 KB Created: 2021-09-18 15:31:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: d883ab3528387432561f0e539298fa31 SHA-1: 38a231a2473d26209fb084724cf26eaafb8e6010 SHA-256: 1de3b0369daedaf94b4d33124ef5baf7b51a0ac76c4217aba5d8b9de025b8183
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a common phishing lure by presenting a full-page image, likely a screenshot, to obscure clickable elements. The embedded JavaScript and numerous external URIs suggest an attempt to redirect the user to malicious content or initiate a download. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8248

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://turatabor.hu/media/nekifobegubiduxokufo.pdf In PDF document text
    • http://steakclubhn.com/campannas/file/33052832053.pdfIn PDF document text
    • https://i-try.tw/upfile/files/2021/09/16/ponabuxamemiborop.pdfIn PDF document text
    • https://hazeloyun.com/calisma2/files/uploads/xiwerar.pdfIn PDF document text
    • http://firegallery.ru/img/upload/78851952297.pdfIn PDF document text
    • http://romangruszecki.com/uploaded/file/15869790793.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/161409ad63ae1a---55891611166.pdfIn PDF document text
    • http://downtowncincyhotels.com/core_degree/admin/images/cms_imagesfiles/963663391.pdfIn PDF document text
    • http://www.biogreeno.com/cms/ckfinder/userfiles/files/77400928810.pdfIn PDF document text
    • http://nuovartea.eu/userfiles/files/pogodoxewovugonov.pdfIn PDF document text
    • http://ameshamagazine.com/js/upload/files/jivuduj.pdfIn PDF document text
    • http://elverum-revmatiker.no/images/file/tigudivu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=minecraft+dungeons+android+free+downloadPDF link annotation

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