Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ec9e0f62a1c4ea2…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 06:28:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 4d4c33d499c3160b0e056f4463a11060 SHA-1: 2d37925b412e033c17d91778778af5ae4df9e875 SHA-256: 3ec9e0f62a1c4ea26037bebdb52620e2175c5da0c1dd22a64a38316939b1afdd
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/hacker-coin-master-game-hack PDF link annotation
    • http://muslib.unmus.ac.id/repository/how-to-hack-a-roblox-account-easy-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/tiktok-free-view-30_GM835599320.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-make-a-server-in-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/cheap-free-easy-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/fb-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-unlimited-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-easily-low-age-rating_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-links-that-don-t-expire_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/games-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-lumber-tycoon-cheats_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-coins-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/www-robux-us_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_002_off00003014.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3014 23056 bytes
SHA-256: 53221309fd3c67e90bea3f50eb0d9e36b4ee18e4a5f118640c6a7edbdf1110aa
font_01_sfnt_off000063f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F5 18004 bytes
SHA-256: 3b00d002f064a1bffd211e69e7b7eee4435707ee9e089706d32f556073cfa910

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