Malicious PDF — malware analysis report

Static analysis result for SHA-256 c08b0c1dfac7e4b4…

MALICIOUS

PDF

47.5 KB Created: 2021-06-04 03:58:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 82643608f2ae816c8064d77047f620c3 SHA-1: e2c0f745431bfcd3c2abdc6d69373d236094a3ae SHA-256: c08b0c1dfac7e4b433bf7c599dfdc44f7eb53b3857d76eabb6aa15df0db91075
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. 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 0.9769

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/blogspot-free-spins-coin-master-game-hack PDF link annotation
    • http://library.yamasi.ac.id//repository/coin-master-free-spin-link-daily_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-mod_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-face-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-minecraft-windows-10-with-java_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coins-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-minecraft-account-and-password-2021_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spin-27_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/is-windows-10-minecraft-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/como-hackear-coin-master-2021-espaol_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/hack-coin-master-online-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-minecraft-mods-for-ps4_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/real-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/where-tiktok-free-view-iphone-11_GM835599320.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_off000051fd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51FD 24948 bytes
SHA-256: 058b5a816e2d08af436e4264d776dcb8d860ce47609059d9e39650110a49fbc7
font_01_sfnt_off00008bab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BAB 3124 bytes
SHA-256: a0e4a5f378f23ac829e40ef1a0638115ffab18b17acd7561ed9b637601232063
font_02_sfnt_off0000968d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x968D 18464 bytes
SHA-256: 13f550290c9517edfa079139010aad5547f5fad726399bfec3a78be220de1a28

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