Malicious PDF — malware analysis report

Static analysis result for SHA-256 a462816b9518ee70…

MALICIOUS

PDF

43.5 KB Created: 2021-05-13 16:01:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: edd2bedbdbd983d31b6cc9baabb0bb81 SHA-1: 17d6449950680e03d9242cfbc7c6be4af7434b67 SHA-256: a462816b9518ee70c810b827b7f8731fc29a0d1961655b0ee4affccaf16baeff
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 0.9969

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.xyz/app/431946152/how-to-get-free-robux-fast-and-easy-game-hack PDF link annotation
    • http://pustakasma.nurulfikri.sch.id/repository/freespinandcoin-blogspot_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/cmaster-club-coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/how-to-get-free-spins-on-coin-master-without-waiting_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/coin-master-lucky-patcher-hack_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/coinmaster-fan-page_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/how-to-make-a-private-server-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/com-roblox_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/how-to-get-free-skins-in-roblox_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/roblox-free-executor_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/xray-hack_GM479516143.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-coin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/coin-master-free-spins-april-2021_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_003_off00004921.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4921 25872 bytes
SHA-256: a6dee74bdf098155ec8abb280f11dcebcc1a24c94d6c4bb98c5597698c88f6e2
font_01_sfnt_off000085bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85BD 18864 bytes
SHA-256: 264ac3d9ee16189788a918c90b00fec891485e046f110455159a23ab28eb8c09

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