Malicious PDF — malware analysis report

Static analysis result for SHA-256 24cf6bfd38ec6cfc…

MALICIOUS

PDF

35.8 KB Created: 2021-07-04 15:50:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 8273547f67e2cda2fc37e12c1db9cf8e SHA-1: a7a6aca556d6c2ca01b0353e8a269a2aa2c6ee3e SHA-256: 24cf6bfd38ec6cfce8d2e0a654adcdef5a6e65ba73e364e6c07d96aaf7b7a8af
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'Coin Master Free Soins Game Hack'. The document body and embedded URLs suggest a lure for game-related cheats or hacks, which is a common social engineering tactic. The primary function appears to be redirecting users to potentially malicious sites, likely for further exploitation or malware delivery.

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/406889139/coin-master-free-soins-game-hack In PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-hack-app-ios_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/dlc-script-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-free-spins-ios-2021_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-change-your-clothes-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-stop-roblox-hacking_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-free-shirt-templates-download_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/strucid-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-hack-a-minecraft-account_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-make-a-dominus-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-old-roblox-accounts_GM431946152.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_off000034e4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34E4 23660 bytes
SHA-256: 4b1bf4521aa607acca47102dd4003115eb4dfb59846fee3200a4cf9e2595442b
font_01_sfnt_off00006a6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6E 17996 bytes
SHA-256: f4306de497449c0c0250de5deec7b8066a87c54091f9de3abe5accc399ec3ddb

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