Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ca4b0c1651eab2f…

MALICIOUS

PDF

22.0 KB Created: 2021-07-05 16:09:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b18a605fa087e83df53f566764cc67f4 SHA-1: 6631995ed71c319fd50194233cbccdb6a50529e1 SHA-256: 8ca4b0c1651eab2f795ec775fe6dbc7d8b79bc37f83d46fa0890b7ea93372d65
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on a malicious redirector URL, promising free in-game currency and hacks. The primary redirector URL is http://netcdn.tw/app/431946152/free-robux-no-offers-game-hack. This behavior is consistent with phishing or scam campaigns that leverage social engineering to drive traffic to malicious sites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 http://netcdn.tw/app/431946152/free-robux-no-offers-game-hack In PDF document text
    • https://sunnygarden.com.tw/image/data/files/how-to-get-free-bc-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/hack-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/copypasta-free-robux-meme_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/roblox-ninja-legends-free-vip-server-2021_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/coin-master-free-spins-daily-link-game-mod_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-robux-help_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/coin-master-hack-no-download_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/coin-master-gold-cards-hack-english_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/minecraft-pe-hacks-2021_GM479516143.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/how-to-get-robux-for-free-2021-easy_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-robux-secret_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/unredeemed-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/minecraft-free-app_GM479516143.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-robux-android-game_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-game-pack-with-google-play-coin-master_GM406889139.pdfIn PDF document text

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