Malicious PDF — malware analysis report

Static analysis result for SHA-256 d397fcc9067222d9…

MALICIOUS

PDF

34.0 KB Created: 2021-07-04 10:27:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: e245a191814c7bf7d3640ee0248b2c29 SHA-1: 18f25dce1724d1de9c59f1339b89d2aa520fa62e SHA-256: d397fcc9067222d902e4ac73696a7a3df79d192585ce40dbc34f2930a11f8bc7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document exploits user interest in game hacks and free currency by embedding links to a malicious redirector. The primary lure, 'How To Hack Robux 2021 Pc', directs users to http://netcdn.tw/app/431946152/how-to-hack-robux-2021-pc-game-hack, which is flagged as malicious infrastructure. The document's structure and embedded URLs suggest a phishing or scam campaign designed to lead users to potentially harmful content or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/431946152/how-to-hack-robux-2021-pc-game-hack In PDF document text
    • https://www.sonestad.se/library/repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-robux-automatically_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-get-btools-in-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-get-free-tiktok-like_GM835599320.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/lucky-patcher-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/static-moonactive-net-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/300-daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/robux-generators-that-actually-work_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-free-spin-app-reviews_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-hack-app-link_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-links-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-hack-1021_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_off00002dde.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2DDE 22268 bytes
SHA-256: 72c68d48df7614cdb999b5eb0cef6d3db0ce50977e75c8ca38e3cd1006f98d91
font_01_sfnt_off00005f10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F10 19256 bytes
SHA-256: 474c3df63f9f15c383aa01f2678c6de7ed064966979ed0a00885027e73b9e08f

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