Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1c8a1011f00111e…

MALICIOUS

PDF

45.0 KB Created: 2021-06-07 05:13:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8f94bd29e2f6190f9062e01b28bd21e3 SHA-1: ca3aa8a1e189da2f3c098f7721a6ff3376ee1287 SHA-256: b1c8a1011f00111e2682e5d8dd9882dd72e5ffbece4c7e736a5ea7551ef64936
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary focus on 'free generator / game hack' lures. The document body and heuristics indicate a strong redirection to external sites, likely for phishing or malware distribution. No scripts were extracted, but the presence of numerous malicious-looking URLs suggests a downloader or redirector pattern.

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.tw/app/431946152/free-roblox-accounts-with-bc-2021-game-hack PDF link annotation
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/minecraft-114-download_GM479516143.pdfIn PDF document text
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/oprewards-robux_GM431946152.pdfIn PDF document text
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/coin-master-500-free-spins_GM406889139.pdfIn PDF document text
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/my-roblox-account-was-hacked_GM431946152.pdfIn PDF document text
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/free-robux-legit_GM431946152.pdfIn PDF document text
    • https://mismuh-kota-utara.sch.id/__statics/gudangsoal/files/how-to-hack-someones-minecraft-account_GM479516143.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_off000051ba.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51BA 25720 bytes
SHA-256: 606d2bc8206d1d830cadddc5d173f7af8afa96fce052fdd4cf1d9d51fc76ff26
font_01_sfnt_off00008b09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B09 19076 bytes
SHA-256: 99e2a09449f908c542fbb52699e037ea87a8831468ea42652080c95a878d5c4d

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