Malicious PDF — malware analysis report

Static analysis result for SHA-256 e28a6661b7c062ff…

MALICIOUS

PDF

45.6 KB Created: 2021-06-09 05:23:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1c1e81ab18f865228eea5f6e4657d205 SHA-1: da36f5da82652188a5a7ddc1e652d0500d710456 SHA-256: e28a6661b7c062ff5919779e1cd933e8446d011b8e41f29d3cc735085ef59fcd
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 0.9864

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/aimbot-cheat-roblox-game-hack PDF link annotation
    • http://digilib.stimata.ac.id/repository/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/what-is-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-fun-com-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-spin-and-coin-blogspot_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/legitimate-coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-toy-codes-free_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/como-hackear-a-una-persona-en-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-bubble-gum-simulator-cheat-codes_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-cbro-free-cases_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_004_off00004eb8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EB8 28568 bytes
SHA-256: 2d0a281fa3ae95c7240ed0fd852d6160d33ca9f0eec324fb8d51d177a0d8c453
font_01_sfnt_off00008e7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E7F 18660 bytes
SHA-256: e4dc58df33b809ed0f35a50c600e16d28385e4c2d716d523f5a9eb3debb2ddaf

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