Malicious PDF — malware analysis report

Static analysis result for SHA-256 511ec11fae200f05…

MALICIOUS

PDF

41.5 KB Created: 2021-05-15 15:54:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 47527ae17c69e56679081b700ad42bf2 SHA-1: b0a3e6b6ffb933e876abec22e9571bce6c5f2072 SHA-256: 511ec11fae200f0555d9de97c3ca175a35c7bb391d8f18a21d05a5c1a8ab75b9
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/free-spins-and-coins-for-coin-master-game-hack PDF link annotation
    • http://www.reikiusui.it/images/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://www.reikiusui.it/images/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://www.reikiusui.it/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.reikiusui.it/images/free-robux-real_GM431946152.pdfIn PDF document text
    • http://www.reikiusui.it/images/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • http://www.reikiusui.it/images/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.reikiusui.it/images/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.reikiusui.it/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://www.reikiusui.it/images/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.reikiusui.it/images/coin-master-free-spin-link-today-50_GM406889139.pdfIn PDF document text
    • http://www.reikiusui.it/images/coin-master-free-coins--spins_GM406889139.pdfIn PDF document text
    • http://www.reikiusui.it/images/earn-roblox_GM431946152.pdfIn PDF document text
    • http://www.reikiusui.it/images/roblox-cheat_GM431946152.pdfIn PDF document text
    • http://www.reikiusui.it/images/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.reikiusui.it/images/coin-master-fan-club_GM406889139.pdfIn PDF document text
    • http://www.reikiusui.it/images/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://www.reikiusui.it/images/minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.reikiusui.it/images/roblox40com-robux_GM431946152.pdfIn PDF document text
    • http://www.reikiusui.it/images/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.reikiusui.it/images/roblox-hack-generator_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_off00004672.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4672 24956 bytes
SHA-256: 6109f6a8f2765d137348225667b83605ac5970b3e9974a04de5a283b4735325b
font_01_sfnt_off0000807c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x807C 18060 bytes
SHA-256: d4954d2d00bde9f6a1061857a61d2c62c1ae360f44744af150ee923481526d51