Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd7532ddd78adfed…

MALICIOUS

PDF

46.8 KB Created: 2021-06-03 06:22:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 5c574005eab013432f5b2db344dbe0f3 SHA-1: dc53e305e28591d06464ab9c99a236778e4dc855 SHA-256: bd7532ddd78adfed033158b5a72ec137de00ed25eec84f5a9b8126253695d3e6
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 0.9748

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-online-hack-generator-game-hack PDF link annotation
    • http://e-library.smkn1jombang.sch.id/repository/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-roblox-clothes-and-hair_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/robux-redeem_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-game-free-spin-download_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-34-5-hack_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/how-to-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/pokemon-go-free-download-version_GM1094591345.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-hack-link-2021_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/rbx-robux_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/robux-for-kids_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_004_off000050a2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50A2 24216 bytes
SHA-256: 2713c5f15578e486accf8e2d5b2608ca2f219527e1e8f7a57d47e2c079934956
font_01_sfnt_off000087d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87D5 4020 bytes
SHA-256: 7d3617ecf51e14e6cffc9372c4441988c3b6cb3ea010f7512aee6af842ef388d
font_02_sfnt_off00009560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9560 17788 bytes
SHA-256: ad851a765ea361b6c06a758d3cf3a23c1a0806d07c65aa9d09c455148703e502

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