Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ae7d18970e6be3a…

MALICIOUS

PDF

45.2 KB Created: 2021-06-08 21:15:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4590b84e63fc15798225c8a7af42697d SHA-1: 1d8a0c22b0c4e88c41514d4188e36c18243fe20c SHA-256: 9ae7d18970e6be3a63dbdec21615afeaf0d01bcc230da793a91cf57d262dd456
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/free-vip-server-roblox-lumber-tycoon-2-game-hack PDF link annotation
    • http://stpc.it/images/how-to-get-200-robux-free_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/roblox-hacks-for-mac_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/wwwcoin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • http://stpc.it/images/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://stpc.it/images/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://stpc.it/images/how-do-u-get-robux_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/coin-master-heaven-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://stpc.it/images/make-robux_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/roblox-hack-apk-para-pc_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://stpc.it/images/free-roblox-toy-codes_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://stpc.it/images/completed-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://stpc.it/images/coin-master-link_GM406889139.pdfIn PDF document text
    • http://stpc.it/images/weird-roblox_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_off000050c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50C1 25468 bytes
SHA-256: e0c1c8a61f33f6c4af6775226ce41d66e8a094d9188cb7ac851debe5cff0019f
font_01_sfnt_off00008b6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B6A 19196 bytes
SHA-256: 77b01907ff3c3cab85ac80c5d4b33c964f87373826be3ab6b06074fcfa03be70

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