Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ad9c4fc04fcf6e6…

MALICIOUS

PDF

33.2 KB Created: 2021-07-05 08:46:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ffe3b55d3e5531fd33b8cca232a037da SHA-1: 54b45245e1e216f4bd33a5e3d6b94cf03b6e1106 SHA-256: 4ad9c4fc04fcf6e6368ab8af8fb8e39343cf8f36dc82e98992a053ed404dfac7
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/mcpe-master-hack-coin-apk-game-hack PDF link annotation
    • http://aeridefense.com/image/data/files/roblox-updated-hack_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/roblox-bear-face-mask-free_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/coin-master-hack-mod-apk-35-8_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/100-free-robux-daily_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/game-hunters-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/roblox-online-free-no-download_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/how-to-get-free-dinos-in-dino-sim-roblox_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/clicksfly-com-free-robux_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/fishing-simulator-roblox-hack-vehicle-mods_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/mcpe-116_GM479516143.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/free-coin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/longshot-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/coin-master-free-spin-ml_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
font_00_sfnt_off00002e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E9F 21924 bytes
SHA-256: 4c472b97db5d8015795fe6e2e648d2068bb645455d8ea8333acf5e08f8905f5a
font_01_sfnt_off00005f2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2C 18180 bytes
SHA-256: 87072597483cb08a2f983c489319c3f89934693df86524fd72547e99bba744fc

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