Malicious PDF — malware analysis report

Static analysis result for SHA-256 232f9ffaaf50ca29…

MALICIOUS

PDF

35.1 KB Created: 2021-07-06 12:09:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f7c422f572fc67e7926f922406a25fd4 SHA-1: 951f20fd765c30886342380326c76f77b155b249 SHA-256: 232f9ffaaf50ca29ac2ab482fe3dd866781b750065b639e4b3e76068e1ab2f1d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one at offset 0x22F pointing to 'http://netcdn.tw/app/406889139/coin-master-hack-pc-game-hack'. This URL is flagged as a game hack lure, indicating a social engineering tactic to trick users into visiting a potentially malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of embedded URLs and the lure suggest a phishing or malware distribution attempt.

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/coin-master-hack-pc-game-hack PDF link annotation
    • http://www.stttekstil.ac.id/elib/repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/accesories-hacks-royale-high-roblox_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-vido_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/ezekiel-free-robux_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/who-did-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-cheat-hack-download_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/hack-de-robux-gratis_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-spin-link_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-get-prison-life-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/cute-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/complete-offers-for-robux_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-hoodie-t-shirt-free-shipping_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-800-robux-free-gamekit_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-coin-flip-hat-hack_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-menu-hack_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-play-for-free-login_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-r-cheats-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-link-today_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
stream_002_off000030f2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30F2 23824 bytes
SHA-256: 9c614b551964b25d512c4013a86bcaebcd25483372ed4fcb9de3548606d09e11
font_01_sfnt_off000066f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66F5 18160 bytes
SHA-256: fd8dd7e41966129b00bd6faab6d015b3d95d63fef28ab848195abaaf238f8237

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