Malicious PDF — malware analysis report

Static analysis result for SHA-256 b13939720afe5be8…

MALICIOUS

PDF

45.2 KB Created: 2021-06-03 23:58:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 558d54fcdc0f5c5d219514e741babdca SHA-1: ca85ae7022c2298ea35452e86a4a454eb4d2dc35 SHA-256: b13939720afe5be84f658fda0e9f935dbe9faa0ec42a02691f018946667d3aa2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple external links, including one pointing to 'minecraft-realms-free-codes-game-hack', indicating a lure for game-related exploits. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' confirms this, and the ML classifier also flagged the PDF as malicious. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest the document is designed to redirect users to potentially malicious sites for further exploitation.

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/479516143/minecraft-realms-free-codes-game-hack PDF link annotation
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/free-roblox-generator_GM431946152.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/free-roblox-generator-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/optifine-pe_GM479516143.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/free-spin-appscoin-master_GM406889139.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/facebook-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/coin-master-lucky-patcher-hack_GM406889139.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/free-games-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/how-do-you-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/jailbreak-script_GM431946152.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/minecraft-beta-free_GM479516143.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/free-coins-and-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/roblox-com-free_GM431946152.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/ear-free-spins-for-coin-master_GM406889139.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_off000051b7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51B7 27840 bytes
SHA-256: d15d1b98329c3d410249bcaef1a421bbe5c844e580a114b9d65e28dad5b78999
font_01_sfnt_off00008e5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E5A 18216 bytes
SHA-256: 30a8f83054e231b1bb485b1ca025b33fda8ee43bcea67b958af1de796f39c45f

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