Malicious PDF — malware analysis report

Static analysis result for SHA-256 88dca401b36ed912…

MALICIOUS

PDF

48.7 KB Created: 2021-06-11 04:21:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8a5fe08212ee02e9215a6ddf21ed580c SHA-1: 05b8da6cc2d6e039893d974c086c14f112ea33f0 SHA-256: 88dca401b36ed912cb74cef349498653b5f1af5f4704caf2e0d1aff78a89edf2
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 0.9796

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 https://netcdn.tw/app/431946152/roblox-twisted-murderer-free-radio-game-hack PDF link annotation
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/free-tiktok-bots_GM835599320.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/hacks-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/roblox-vehicle-simulator-hack-download_GM431946152.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/free-roblox-outfits-for-boys_GM431946152.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/free-tiktok-fans-hack_GM835599320.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/how-to-hack-into-vip-servers-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/roblox-apocalypse-rising-hack-october-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/how-to-speed-hack-in-roblox-mobile_GM431946152.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005379.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5379 25620 bytes
SHA-256: c09b3f1c75e69f4536252aa09810df324c564893a38b5c614785181e0ec7c685
font_01_sfnt_off00008f22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F22 2892 bytes
SHA-256: a11247a8a9a886589a9bc086a7a230481df2dc5a341c718e79df078095cade05
font_02_sfnt_off00009926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9926 19076 bytes
SHA-256: 96e765ce5a5e8de2210b11f3460a63c4f4e0a50c3d895601f3b488283e14082b

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