Malicious PDF — malware analysis report

Static analysis result for SHA-256 da35ea7858cc4f06…

MALICIOUS

PDF

44.9 KB Created: 2021-05-11 00:39:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 871048eb22915a72281e1e0da386f048 SHA-1: 95e4e8bcb3f3588786430002afbf76bd95b320b4 SHA-256: da35ea7858cc4f06193cce9d74137e6b0ab6472954cc7ef43b9dbe8dd2bf1629
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 0.9632

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/spin-link-coin-master-game-hack PDF link annotation
    • http://kita-sunshine.de/images/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/minecraft-hacks-xbox_GM479516143.pdfIn PDF document text
    • http://kita-sunshine.de/images/coin-master-hack-apk-link_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/free-spins-coinmaster_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/coin-master-hack-pro-gamers-com_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/free-roblox-gear_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/100-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/roblox-free-body_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/master-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048c6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48C6 25308 bytes
SHA-256: 4bfc2235cf5dddc048b59f34c8acfaa187097db92c049d79891f1170093e277e
font_01_sfnt_off000082c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82C6 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off00008def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DEF 17892 bytes
SHA-256: 36e2a9e8d5493d71a45802091441cfba4dbdcc3e1acf36cfa44a264c3c73fcb6

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