Malicious PDF — malware analysis report

Static analysis result for SHA-256 7631a79bff625d4d…

MALICIOUS

PDF

36.2 KB Created: 2021-07-04 09:14:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f1e60605d032aebf140e30b7bf7fafa1 SHA-1: 02dd04a64196b6d9393f4aa55c7e0c236c165095 SHA-256: 7631a79bff625d4df1296cd2aa9220b475db386da4d8d2a2cd6042bceff74dfc
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a game hack lure to trick users into visiting a malicious URL. The document contains multiple embedded URLs, with the primary one being http://netcdn.tw/app/406889139/coin-master-hack-apk-35-8-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a potential for further malicious actions, such as downloading a second-stage payload, which is a common tactic for this type of lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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-hack-apk-35-8-game-hack PDF link annotation
    • http://library.forda-mof.org/katalog/repository/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-2021_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-character-free_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/cpbildco-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/mangocheats-com-hack-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/fast-robux-online_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/minecraft-pocket-edition-free-apk_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/pig-master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-roblox-suit-shirt-templates_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
font_00_sfnt_off00003445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3445 23520 bytes
SHA-256: e74ce7abdf097e2915b19cc8db684c25f61d5a013aeb976a47623cd43a31e8de
font_01_sfnt_off00006954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6954 18696 bytes
SHA-256: 69b4a3ebe7d4e13e60a257f8c137696d5b2ec2d9c23dd61936efc68b08181d97

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