Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9a50ef488b7109a…

MALICIOUS

PDF

44.0 KB Created: 2021-05-11 21:30:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 146aaeb937d4972217837d17afc20d1a SHA-1: 9512206edbe054d08f3a40956499c5fa4cb4d440 SHA-256: b9a50ef488b7109a92062fdbb139a32936c2db3b3c90601337e8367df6705c00
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 0.9969

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-spins-in-coin-master-without-human-verification-game-hack PDF link annotation
    • https://elearning.mialmarufbeyan.sch.id/__statics/gudangsoal/files/flip-master-coins-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mialmarufbeyan.sch.id/__statics/gudangsoal/files/coin-master-hack-ios-12_GM406889139.pdfIn PDF document text
    • https://elearning.mialmarufbeyan.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://elearning.mialmarufbeyan.sch.id/__statics/gudangsoal/files/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • https://elearning.mialmarufbeyan.sch.id/__statics/gudangsoal/files/pig-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://elearning.mialmarufbeyan.sch.id/__statics/gudangsoal/files/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • https://elearning.mialmarufbeyan.sch.id/__statics/gudangsoal/files/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mialmarufbeyan.sch.id/__statics/gudangsoal/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mialmarufbeyan.sch.id/__statics/gudangsoal/files/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mialmarufbeyan.sch.id/__statics/gudangsoal/files/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • https://elearning.mialmarufbeyan.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin-link-today_GM406889139.pdfIn PDF document text
    • https://elearning.mialmarufbeyan.sch.id/__statics/gudangsoal/files/coin-master-hack-progamers_GM406889139.pdfIn PDF document text
    • https://elearning.mialmarufbeyan.sch.id/__statics/gudangsoal/files/coin-master-pc-hack-download_GM406889139.pdfIn PDF document text
    • https://elearning.mialmarufbeyan.sch.id/__statics/gudangsoal/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mialmarufbeyan.sch.id/__statics/gudangsoal/files/roblox-avatar-tester_GM431946152.pdfIn PDF document text
    • https://elearning.mialmarufbeyan.sch.id/__statics/gudangsoal/files/get-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • https://elearning.mialmarufbeyan.sch.id/__statics/gudangsoal/files/androeed-ru-minecraft_GM479516143.pdfIn PDF document text
    • https://elearning.mialmarufbeyan.sch.id/__statics/gudangsoal/files/redeem-roblox-card-free_GM431946152.pdfIn PDF document text
    • https://elearning.mialmarufbeyan.sch.id/__statics/gudangsoal/files/free-private-server-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mialmarufbeyan.sch.id/__statics/gudangsoal/files/daily-coin-master-free-spin-link_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_003_off00004a61.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A61 27128 bytes
SHA-256: 42d192c8a3db685d8fccc68e58bfd42a7a3a317e45a8e12cab89a3e4c81d5780
font_01_sfnt_off0000884f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x884F 18784 bytes
SHA-256: 2f08f52b73595fa95dbe25467555bd1443f7cdd3e7404a9db3231e6e64119a30

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