Malicious PDF — malware analysis report

Static analysis result for SHA-256 214d7632f6879434…

MALICIOUS

PDF

33.6 KB Created: 2021-07-05 10:00:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: cea311bf40923cf7a2776971613b6805 SHA-1: 5c59465115e973e7083bf77dec36722817df9e8e SHA-256: 214d7632f6879434eec06502797d2245b7e3f06e42f9e26a07e89d4eea91fbf8
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, including one to 'netcdn.tw' promising game hacks, and many others hosted on 'digilib.iailm.ac.id' also related to game cheats and free currency. The heuristic firings indicate this is a link farm designed to redirect users to potentially malicious sites. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/431946152/give-me-robux-game-hack PDF link annotation
    • http://digilib.iailm.ac.id/repository/coin-master-free-spons-apk-2021_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/generate-robux-for-free-with-no-downloading-games_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-hack-prison-life-20-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-a-free-shirt-on-roblox-without-bc_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-unlimited-coin-master-online-tool_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-spin-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-adopt-and-raise-a-cute-kid-free-admin_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/is-tiktok-free-on-ipad_GM835599320.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-start-hacking-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/ghost-hack-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/bit-slicer-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-roblox-games-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/make-roblox-shirts-free_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-minecraft-skins-xbox-one_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/robux-hack-no-human-application_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-card-code-generator-download-free_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-hack-game-download-ios_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_off00002c6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C6E 22356 bytes
SHA-256: af46d88bcd0c900a0c81bdd7e2033d8d14f04bbf5a3e9653a999d30afeedc0bb
font_01_sfnt_off00005e38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E38 18984 bytes
SHA-256: 4e46e4fba873faa5c118d7fc25cc80c06536480829301173d0374a806a09fbcf

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