Malicious PDF — malware analysis report

Static analysis result for SHA-256 34a35654d7210a60…

MALICIOUS

PDF

41.5 KB Created: 2021-09-21 19:09:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 17d4a62d902557d42243399dc8ef5e4f SHA-1: d354dea216316e66fbb17b4310d35c8b9d24a8be SHA-256: 34a35654d7210a60c12ff1c6bf9f146609a4b9947dc5f03a5fb85739e903bc14
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and is flagged by ML classifiers as malicious. It also uses an image-only lure with a clickable action, typical of phishing attempts. The embedded JavaScript likely attempts to redirect the user to one of the numerous external URLs found in the document, which are often used for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6964

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.
  • 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 https://drafthe.ru/uplcv?utm_term=how+do+apps+update+on+android PDF link annotation
    • https://shriayurvednagpur.org/public/ckfinder/userfiles/files/vajapuz.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1631692833.pdfIn PDF document text
    • http://finemetal-cn.com/upload/files/55153601785.pdfIn PDF document text
    • http://tsrmvolontari.it/userfiles/files/vubinewitowabegixoji.pdfIn PDF document text
    • http://eventologia.com/userfiles/files/ragopuvivoberug.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147358f26626---11720426706.pdfIn PDF document text
    • http://tai-group.com/upload/files/92391230776.pdfIn PDF document text
    • http://biondiairsystem.it/userfiles/files/1685730440.pdfIn PDF document text
    • http://tinavaron.com/ckfinder/userfiles/files/89528718192.pdfIn PDF document text
    • http://www2.grupoksl.com.br/js/ckfinder/userfiles/files/20308062900.pdfIn PDF document text
    • https://mbamantra.com/ci/userfiles/files/duwusejuj.pdfIn PDF document text
    • https://bibliotheque-des-arts.ch/ckfinder/userfiles/files/rekopikigojapowuzekirov.pdfIn PDF document text
    • http://xn----7sbjvweekof5d.xn--p1ai/files/files/52854367775.pdfIn PDF document text
    • http://parkergeneralcontractors.net/userfiles/file/ligoniroxat.pdfIn PDF document text
    • https://ceccarbotosani.ro/userfiles/file/jegabesovepiwilimimuzasa.pdfIn PDF document text
    • http://fruitvita.com/files/files/misodazale.pdfIn PDF document text
    • http://rld-carbon.com/file/14357134441.pdfIn PDF document text
    • http://maurovalleferroarchitetto.eu/userfiles/files/xaberupadodovibipivog.pdfIn PDF document text
    • http://ckm-machinery.com/userfiles/files/kavemawakavolunu.pdfIn PDF document text
    • https://umutfm.com/resimler/files/risavuxob.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210912174334.pdfIn PDF document text
    • http://kriosispl.com/cote_dor_import/admin/ckfinder/userfiles/files/68421538390.pdfIn PDF document text
    • http://whkmradio.com/userfiles/file/vebitukonafomulalam.pdfIn PDF document text
    • http://offerseir.com/basefile/offerseircom/files/xogokobub.pdfIn PDF document text
    • https://nusantarabet4d1.com/contents/files/54178402404.pdfIn PDF document text

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