Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d7b2c9f7ab761fc…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 21:54:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0f7c657cbb702d5f67bd08f6f981a80c SHA-1: ce1cbb41a538b51954d57e707695f6ebca9f74fd SHA-256: 0d7b2c9f7ab761fc8f01eb8a01b69ba6e5abb926b9ea2ae738dce44afeb23797
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free spins'. The primary lure URL is http://netcdn.tw/app/406889139/coin-master-hack-spins-game-hack, which is flagged as a malicious redirector. The document body and embedded artifacts suggest a social engineering attempt to trick users into visiting these sites, likely for further malware delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/406889139/coin-master-hack-spins-game-hack In PDF document text
    • https://www.cinemapalace.ro/trailer/files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/coin-master-hack-for-ios_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/how-to-get-free-roblox-items_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/how-to-buy-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/coin-master-fun-hack_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/coin-master-hack-ios-jailbreak_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/roblox-script-to-hack-into-an-accont_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/change-your-birthday-to-this-date-for-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/freespins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/roblox-free-online-game_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000031a9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31A9 22964 bytes
SHA-256: 74bd8216835ca57a4587d9822ec233727a9bc999c4141204c616551fd20eee06
font_01_sfnt_off00006546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6546 18180 bytes
SHA-256: 8089ec70024e38c963cd1b8e4fd66f251d2ac35f3e2526171ef4435f22e5a9e0

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