Malicious PDF — malware analysis report

Static analysis result for SHA-256 39cb65754269e285…

MALICIOUS

PDF

44.1 KB Created: 2021-06-03 08:59:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1a1032b1b6b4620060ffea30384a0208 SHA-1: e7804fd626ce4a41e09342f2b8995938db5789de SHA-256: 39cb65754269e285e0592e7a3666f2054fbe76b4827602216b3bc691beb620ab
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 0.9865

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.online/app/406889139/coin-master-free-spins-promo-code-game-hack PDF link annotation
    • http://pustaka.keperawatan.unand.ac.id/repository/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/coin-master-hack-2021-without-verification_GM406889139.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/robux-miner_GM431946152.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/coin-master-free-spins-2021-blogspot_GM406889139.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/coin-monster_GM406889139.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/free-to-play-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/robux-boost_GM431946152.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/coin-master-hack-tool-access-online-generator_GM406889139.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/free-robux-on-phone_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_off000051c6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51C6 24312 bytes
SHA-256: e73a90783f36fd04ad9805db1902231d63eb9ac8a5d0146726ae2dde3f63064e
font_01_sfnt_off0000891b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x891B 18476 bytes
SHA-256: dc3ef91c42b56b19e880a129857b9cc4209ff723fc15082788877c1745c42c0a

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