Malicious PDF — malware analysis report

Static analysis result for SHA-256 681960544ec61d25…

MALICIOUS

PDF

44.9 KB Created: 2021-05-10 19:04:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 88411a7df1dbee4851a7f983b84146a6 SHA-1: b134f98a392ea3e05da7bbfbc1cfbd116174c4de SHA-256: 681960544ec61d25b3bff082f331a83e5d0fbb0768af8686eeabbaf520aa7322
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 0.9632

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/free-coins-coin-master-link-game-hack PDF link annotation
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-download-apk_GM406889139.pdfIn PDF document text
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/free-minecraft-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/coin-master-daily-spin-link-app_GM406889139.pdfIn PDF document text
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/roblox-18_GM431946152.pdfIn PDF document text
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-without-human-verification_GM406889139.pdfIn PDF document text
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/script-executor-roblox-free_GM431946152.pdfIn PDF document text
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/coin-master-free-coins-link-march-2021_GM406889139.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_off00004cc2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CC2 24544 bytes
SHA-256: 31af2f3a159d9bc384f39de23cca4e6609e96538604d629bffc2bc67c0c88cd8
font_01_sfnt_off00008491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8491 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008e42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E42 17880 bytes
SHA-256: 1662a5b383d9ad60b7b9cee618f90cf0031b74e1c8940e2d562def689eb52552

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