Malicious PDF — malware analysis report

Static analysis result for SHA-256 197299349360b852…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 07:59:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 65efde1d628fe989d2c1476231665e9f SHA-1: 69de85f0ef8ab19112385c65328838bacb0f2ad6 SHA-256: 197299349360b852aa4991ea715ab2020f405a680402bb3b0e7e8d19d2c25b74
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are disguised as game hacks or generators. The primary lure appears to be related to 'Coin Master' and 'Roblox' cheats. The document's structure and content strongly suggest it is part of a link farm or a phishing campaign designed to redirect users to potentially malicious sites. No scripts were extracted, but the extensive use of external links points towards a social engineering attack.

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/coin-master-home-game-hack PDF link annotation
    • http://library.yamasi.ac.id/repository/free-coin-master-spins-no-verification_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/wurst-115_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/roblox-games-with-free-vip-servers_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/tiktok-for-free-online_GM835599320.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-free-builders-club-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spin-whatsapp-group-link_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-spin-coin-master-new-link_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-speed-hack-with-cheat-engine-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-hackhub-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-free-robux-2021-website_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-today-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-roblox-synapse_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/i-want-to-break-free-roblox-versin_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coinmaster-rewards_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_off00003006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3006 22408 bytes
SHA-256: 38649187bd1d44d7a38d9404d9444216864afccb25123f4bd67c18990e7f2a69
font_01_sfnt_off000061d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D1 18092 bytes
SHA-256: ba905ac73eef98627ce31f9a61196988fba84150967a6aeb5bce2c15a28684d9

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