Malicious PDF — malware analysis report

Static analysis result for SHA-256 63d7073210264b37…

MALICIOUS

PDF

32.6 KB Created: 2021-07-03 14:25:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1e5e400734faf6d51ddcc76848ce63fa SHA-1: 639c222617a784a464b4eeef9512c224be48656b SHA-256: 63d7073210264b3762f39cf704d28ecd9acd3887980f56c965272f71d30bc397
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users to external websites, many of which are related to game hacks and free in-game currency. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a malicious intent to drive traffic to potentially harmful sites. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the document body and heuristics point to a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/free-spins-game-hack PDF link annotation
    • http://stitqi.ac.id/website/repository/roblox-welcome-to-bloxburg-for-free_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/minecraft-windows-10-mod-menu_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/download-coin-master-apk-hacked_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/best-tricks-co-robux_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/what-do-points-do-in-roblox_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-card-link-coin-master_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-coin-master-androd-cheats-2021_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/roblox-welcome-to-bloxburg-hack_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-hack-spins_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/tiktok-free-10-likes_GM835599320.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/get-free-spins-for-coin-master_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_off00002bf4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2BF4 22448 bytes
SHA-256: 6fcc2fc8ad0d5a69a0cb471662e2b1fea8407c35c89bd6f9bf2f5f31d5e1871f
font_01_sfnt_off00005de6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE6 17928 bytes
SHA-256: efcb7982fb1ebf8ae16692e1703b45c70a1bb53309ce5298d100930aca9727b8

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