Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f8309ff91b3e693…

MALICIOUS

PDF

33.7 KB Created: 2021-07-07 18:51:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 55f76910e40ea341749f6334978e91f9 SHA-1: d7320669e4190dce46bd4478c9521c182c2056de SHA-256: 2f8309ff91b3e69396050832ef0b0cf7983f8c04eab20f728dda95b5a5039c86
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 0.9980

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 http://netcdn.tw/app/406889139/coin-master-hacks-no-verification-game-hack PDF link annotation
    • http://autoskola-scp.com/files/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-hack-roblox-murder-15_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/hack-roblox-games-pastebin_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-free-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-roblox-hair-boy_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-hair-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-model-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-get-free-robux-easy-2021-december_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/robux-generator-2021-free_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/dead-mist-2-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/pink-paradigm-hack-created-by-lord-of-robux-explication_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-get-robux-easy_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
font_00_sfnt_off0000318e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x318E 21720 bytes
SHA-256: 033d18be21dddcffd9cc668f0158f35ab16505e76e21a1ae79845bd2c5057a1e
font_01_sfnt_off00006135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6135 18140 bytes
SHA-256: 584bd634a741abf14746247beb71184038551534d821baf642793c5d967f1edd

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