Malicious PDF — malware analysis report

Static analysis result for SHA-256 4040999e15e5d1d9…

MALICIOUS

PDF

44.2 KB Created: 2021-05-12 10:42:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: abb317c3792aa67da2c5359cee07e89d SHA-1: dbebf79182f775d9f77b9f242ac8ccddd985a4a2 SHA-256: 4040999e15e5d1d9df778ffc46b93aaa2545465018630be9e42fdb71b68a2f13
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 0.9648

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/406889139/coin-master-hack-spins-game-hack PDF link annotation
    • http://www.pspmrsmkber.com/opac/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/how-to-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-spins-coin-master-links-blogger_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/minecraft-windows-10-key-free_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-online-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-mod-apk-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/coin-master-free-spin-app-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/coin-master-32-android-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000492f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x492F 25156 bytes
SHA-256: 7c166bdfecb8f0f64f75cba2c44feed3b55fc7c58714eecc6885fb4281262826
font_01_sfnt_off0000815a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x815A 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008b45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B45 17892 bytes
SHA-256: 340cad640208a3f63c565dece8f0e8a86db030e36dd2ab9bf46956c7901539b7

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