Malicious PDF — malware analysis report

Static analysis result for SHA-256 90ce3b57ad719452…

MALICIOUS

PDF

34.9 KB Created: 2021-07-04 17:17:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 2555dd1ea495019b01b5f2f6e160c6a6 SHA-1: 53c2eb1c4593d33a8daece906caed7ecba5cec22 SHA-256: 90ce3b57ad7194529a64481d1246ecc6036725d4773b0b96ab0258146fd30f09
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 0.9980

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 http://netcdn.tw/app/406889139/how-to-get-free-snacks-in-coin-master-game-hack PDF link annotation
    • http://elibrary.perludem.org//repository/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-hack-in-roblox-jailbreak-auto-rob-on-mobile_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-hack-on-roblox-mad-games_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/get-roblox-items-free-working-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/fast-hack-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-jailbreak-hack-2021-download_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/withdraw-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-hack-1-robux-into-100-rubux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-game-packs-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-how-to-cheat-on-tycoon-games_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hacking-in-to-denis-account-gone-wrong-im-sorry-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-hack-robux-into-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000032ff.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32FF 22740 bytes
SHA-256: 78b4cc7dd44fe34a0d977798f8d410ca16755129aa5a6f61f9d056a50115b05d
font_01_sfnt_off000065d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65D5 18332 bytes
SHA-256: 9bfaebadd1c63bbcf8fae185af5d645a9ecdb7ad968488e86b545ec7ef79ab2e

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