Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4ec17c7a5b31477…

MALICIOUS

PDF

45.5 KB Created: 2021-06-11 04:05:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ebae633ab3a67525ec7bc63f32a1a9fd SHA-1: 155fed1e6f314b59af1d75b2e1a31bb1ccb14492 SHA-256: e4ec17c7a5b314778c66817f33635c216ea9649671608b5930e51d4336aaf43b
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/how-to-get-free-stuff-on-roblox-ipad-game-hack PDF link annotation
    • http://katalog.gemalibrary.net/repository/pokemon-go-free-and-pokeball-plus_GM1094591345.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-apk-hack-download_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-spins_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-scam-model_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-spins-coin-master-without-survey_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-valkyrie-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/113-hacked-client_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-vehicle-simulator-codes-free-lamborghini_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/annoying-orange-costume-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/robux-best_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-coins-link_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
stream_004_off00005188.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5188 25812 bytes
SHA-256: 0f56f848e35eb754f0278261e9f2a92eafb5b100e3988b94f38d06651cfbe5e7
font_01_sfnt_off00008d17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D17 18932 bytes
SHA-256: f986d14dccd141eb9f8d7adeeaeefe30fc321b034ac0d8e14a61c5eff96ca9bc

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