Malicious PDF — malware analysis report

Static analysis result for SHA-256 9388243433de83ae…

MALICIOUS

PDF

57.0 KB Created: 2021-06-03 05:15:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f00482b6c8beb2a37305d3fc309786b4 SHA-1: 6fce11f432189cd9deb1255bead37ed771450b57 SHA-256: 9388243433de83aee4ff7bc58708ca1f75e5107dac91b6df2bccedf1884b26c4
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 0.9680

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-spin-link-game-hack PDF link annotation
    • http://perpus.stmik-im.ac.id/repository/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-jackpot-hack_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-card-link-free_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-get-free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/rbx-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-install-free_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-link_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/minecraft-free-download-laptop_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-spin-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-32-hack-apk_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000514a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x514A 27232 bytes
SHA-256: 415ef0a4432faef9cec87811fefb2a03f072f8ea20bdd563c31a82ddc723de1d
font_01_sfnt_off00009090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9090 3152 bytes
SHA-256: 9a9ab8cb02c6aaf46d2e1cbdbf3c53d946d508eb48cfa0c4bebcb51a9b338e09
font_02_sfnt_off00009b9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B9D 7960 bytes
SHA-256: cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2
font_03_sfnt_off0000aec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEC2 17892 bytes
SHA-256: 5eaa95033dd4e054ef8b2e0554ac351c032796849467c67c5432bd2ec705e461
font_04_sfnt_off0000cfb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB3 4272 bytes
SHA-256: fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0

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