Malicious PDF — malware analysis report

Static analysis result for SHA-256 afe1fa7b449d9f8d…

MALICIOUS

PDF

40.9 KB Created: 2021-05-17 04:13:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 42113beeef978b883bdfc70ab40794a8 SHA-1: 218621c1c2c2a9dfae65102ca45c4cdf820cc42e SHA-256: afe1fa7b449d9f8d6987c0e0100f05420411e76d44e56d5fd0491f0e08b6afd9
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 0.9971

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/coin-master-invite-friends-hack-game-hack PDF link annotation
    • http://vibrato.fr/images/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://vibrato.fr/images/robux-games_GM431946152.pdfIn PDF document text
    • http://vibrato.fr/images/coin-master-34-4-hack_GM406889139.pdfIn PDF document text
    • http://vibrato.fr/images/rbx-com_GM431946152.pdfIn PDF document text
    • http://vibrato.fr/images/minecraft-for-free-apk_GM479516143.pdfIn PDF document text
    • http://vibrato.fr/images/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://vibrato.fr/images/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://vibrato.fr/images/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • http://vibrato.fr/images/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://vibrato.fr/images/how-to-get-robux_GM431946152.pdfIn PDF document text
    • http://vibrato.fr/images/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://vibrato.fr/images/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://vibrato.fr/images/coin-master-event-hack_GM406889139.pdfIn PDF document text
    • http://vibrato.fr/images/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://vibrato.fr/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://vibrato.fr/images/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://vibrato.fr/images/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://vibrato.fr/images/coin-monster_GM406889139.pdfIn PDF document text
    • http://vibrato.fr/images/websites-for-robux_GM431946152.pdfIn PDF document text
    • http://vibrato.fr/images/rbxcity-free-robux_GM431946152.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_off00004744.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4744 24032 bytes
SHA-256: fbfdeece5a5211a3a41c08e4ba3adeca110e56f43d2b3d6c1ea12f52000eb3cb
font_01_sfnt_off00007d98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D98 18168 bytes
SHA-256: c17a72e64d9a2a6235616ffea6c8e10af0ac15902f6f69ce92b08fd46b474d67

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