Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1fd4481feddb345…

MALICIOUS

PDF

17.9 KB Created: 2021-05-19 11:34:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 8938828592028159f20328f227ff51c6 SHA-1: 770df6b886cd7ccd2efbe9cab9f367fe71f81b1d SHA-256: b1fd4481feddb3452bdf5aa198f40f2a55178d67cb67ece6893900db86e9099a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into clicking on what appears to be a "free generator / game hack". These links redirect to malicious infrastructure, specifically a URL associated with a robux hack lure. The ML classifier strongly flagged this PDF as malicious, and the embedded URLs confirm a social engineering tactic to drive traffic to potentially harmful sites. No scripts were extracted, but the primary attack vector is the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 3

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://netcdn.xyz/app/431946152/robux-hack-no-human-verification-game-hack In PDF document text
    • http://www.danzamaniapergine.it/images/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.danzamaniapergine.it/images/how-to-get-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.danzamaniapergine.it/images/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://www.danzamaniapergine.it/images/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://www.danzamaniapergine.it/images/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://www.danzamaniapergine.it/images/free-promo-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.danzamaniapergine.it/images/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://www.danzamaniapergine.it/images/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://www.danzamaniapergine.it/images/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://www.danzamaniapergine.it/images/coin-master-app-free-download_GM406889139.pdfIn PDF document text
    • http://www.danzamaniapergine.it/images/wurst-115_GM479516143.pdfIn PDF document text
    • http://www.danzamaniapergine.it/images/coin-blogspot_GM406889139.pdfIn PDF document text
    • http://www.danzamaniapergine.it/images/coin-master-hack-spins-app_GM406889139.pdfIn PDF document text
    • http://www.danzamaniapergine.it/images/download-coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.danzamaniapergine.it/images/coin-master-hack-mod-apk-download_GM406889139.pdfIn PDF document text
    • http://www.danzamaniapergine.it/images/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://www.danzamaniapergine.it/images/june-29-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.danzamaniapergine.it/images/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://www.danzamaniapergine.it/images/free-minecraft-account-list_GM479516143.pdfIn PDF document text
    • http://www.danzamaniapergine.it/images/coin-master-spin-hack-without-verification_GM406889139.pdfIn PDF document text

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