Malicious PDF — malware analysis report

Static analysis result for SHA-256 7737f8fa773d8d50…

MALICIOUS

PDF

34.4 KB Created: 2021-06-18 14:58:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: bf91215e29f0d6318094b5116f5076fe SHA-1: e55c18fbf381d2d8ca6677922ff249353c38ad42 SHA-256: 7737f8fa773d8d5034321e0941771b735ed42d7404ae0a1143181b67de366bdc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as free game hacks or generators. The primary lure URL is http://netcdn.co/app/431946152/free-robux-gift-card-codes-2021-feb-game-hack, which is flagged as malicious. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting potentially harmful sites.

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.co/app/431946152/free-robux-gift-card-codes-2021-feb-game-hack In PDF document text
    • http://lib.kunci.or.id/repository/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-online-game_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-hair-roblox-boy_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-win-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/wwwcoin-master-free-spincom_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-hack-quora_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/earn-free-robux-doing-tasks_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-spin-hack-link_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/best-roblox-outfits-for-free_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/clean-master-free-coins-and-spins_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
font_00_sfnt_off00002c1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C1C 22940 bytes
SHA-256: de212c1b47b2bfb3a4968ba112192391c719c9fa29f2d21bd4d13b28575e857b
font_01_sfnt_off00005fcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCF 19516 bytes
SHA-256: 29e75f30c5e86761bb92b3b01e6b6c9178fe3a430d56702e6e4d31a38e0984ae