Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa78e72482a895c4…

MALICIOUS

PDF

45.6 KB Created: 2021-06-11 03:01:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 19f4412af3668cd19904ab394cba35e7 SHA-1: 1f53bd79b13a8a8c562845cda9bb647db1dc6fc0 SHA-256: fa78e72482a895c4f3cbd394b18e60495fc8987edd102ec833a4d6e11517d85a
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 0.9864

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/get-1k-robux-free-game-hack PDF link annotation
    • https://verstricktundzugenaeht.com/images/free-daily-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/free-tiktok-likes-and-followers_GM835599320.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/how-to-get-free-spins-on-coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/coin-master-hack-cydia_GM406889139.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/how-to-get-free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/www-free-robux-de_GM431946152.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/barren-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/robux_GM431946152.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/coin-master-game-android-free-download_GM406889139.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/robuxian-get-2021-free-robux-daily_GM431946152.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/getbucks-roblox-free_GM431946152.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/how-to-get-free-faces-on-roblox_GM431946152.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/free-spin-coin-master-apk_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_off00004f32.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F32 28036 bytes
SHA-256: 27e8e289c5a1509fa0ba65bd2db04344bef3a529121d40d2fc2be92d2b58ad08
font_01_sfnt_off00008f7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F7B 18396 bytes
SHA-256: 5f16f97ec377eb47ce97bc81b7b28c2e150947c3cb97b916ebbe9f261bf07baa

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