Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dcd5422483d058f…

MALICIOUS

PDF

35.1 KB Created: 2021-07-05 03:29:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 3128817ee799b3e1314ad0910c3121d9 SHA-1: 124169413d3852b798ea283fab592a4acad48ad9 SHA-256: 6dcd5422483d058f46e257e96b7852926eb622eaf1aa05134bd175c37123033d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting game hacks and currency generators. The document body and embedded URLs suggest a lure for users seeking cheats for popular games like Coin Master and Roblox. The primary malicious link identified is http://netcdn.tw/app/406889139/coin-master-apk-free-download-game-hack, which is part of a known malicious redirector chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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-apk-free-download-game-hack In PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/coin-master-hack-game-download-mod-apk_GM406889139.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/steal-peoples-robux-hack_GM431946152.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/completed-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/easy-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/free-robux-clothes_GM431946152.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/robux-hack_GM431946152.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/free-murder-mystery-2-roblox-codes_GM431946152.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/roblox-moderators_GM431946152.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/mcpe-master-unlimited-coins-free-download_GM406889139.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/coin-master-free-spins-and-coins-link-haktuts_GM406889139.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/free-gfx-roblox_GM431946152.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/minecraft-free-download-windows-10_GM479516143.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
font_00_sfnt_off00003076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3076 23252 bytes
SHA-256: 48584a01daeb668970a2147cfd8607da761359e7e19a2a795dceaaacdf82c429
font_01_sfnt_off00006478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6478 18924 bytes
SHA-256: 80f479f2842c7b63956049059bb64ea40ae3b1cb380eebc5b1a49b0c67b59a51

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