Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbd03bc2eb37e867…

MALICIOUS

PDF

33.9 KB Created: 2021-07-03 23:47:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ed2986f7ee6eb9443c099720bb519dac SHA-1: d6fa042604548825c0ce16a9647666e6f06eeb25 SHA-256: cbd03bc2eb37e867130ca51c62e34fef9e410f7bad5f76c6128c7814740a8a6c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • 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 http://netcdn.tw/app/479516143/minecraft-dungeons-download-free-game-hack PDF link annotation
    • http://mtsn31jkt.com/__statics/gudangsoal/files/design-it-cheats-roblox_GM431946152.pdfIn PDF document text
    • https://mtsn31jkt.com/__statics/gudangsoal/files/coin-master-free-link-daily_GM406889139.pdfIn PDF document text
    • https://mtsn31jkt.com/__statics/gudangsoal/files/hack-roblox-galaxy-itan_GM431946152.pdfIn PDF document text
    • http://mtsn31jkt.com/__statics/gudangsoal/files/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://mtsn31jkt.com/__statics/gudangsoal/files/hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://mtsn31jkt.com/__statics/gudangsoal/files/how-to-hack-coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://mtsn31jkt.com/__statics/gudangsoal/files/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://mtsn31jkt.com/__statics/gudangsoal/files/free-robux-script-pastable_GM431946152.pdfIn PDF document text
    • http://mtsn31jkt.com/__statics/gudangsoal/files/roblox-hold-space-jump-script-hack_GM431946152.pdfIn PDF document text
    • https://mtsn31jkt.com/__statics/gudangsoal/files/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://mtsn31jkt.com/__statics/gudangsoal/files/coin-master-free-spins-link-download-for-iphone_GM406889139.pdfIn PDF document text
    • https://mtsn31jkt.com/__statics/gudangsoal/files/minecraft-maps-pe-free-download_GM479516143.pdfIn PDF document text
    • https://mtsn31jkt.com/__statics/gudangsoal/files/free-minecraft-java-server_GM479516143.pdfIn PDF document text
    • http://mtsn31jkt.com/__statics/gudangsoal/files/free-robux-site-surveys_GM431946152.pdfIn PDF document text
    • https://mtsn31jkt.com/__statics/gudangsoal/files/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://mtsn31jkt.com/__statics/gudangsoal/files/coin-master-hack-online-link_GM406889139.pdfIn PDF document text
    • https://mtsn31jkt.com/__statics/gudangsoal/files/how-to-cheat-in-roblox-super-power-training-simulator_GM431946152.pdfIn PDF document text
    • http://mtsn31jkt.com/__statics/gudangsoal/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://mtsn31jkt.com/__statics/gudangsoal/files/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • http://mtsn31jkt.com/__statics/gudangsoal/files/free-game-pack-coin-master_GM406889139.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_off0000309e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x309E 21864 bytes
SHA-256: 24dd2ec04899bb4a1a907dc7b0eb7adc019f5b7f26e756f597828c061eec1e05
font_01_sfnt_off00006087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6087 18720 bytes
SHA-256: 921efc7a282f70be8e45d9f485508adcbd6bee6f34856fa33b0668efabfdb805

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