Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7f0d45f03281e65…

MALICIOUS

PDF

45.8 KB Created: 2021-06-03 05:52:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 6a1405dbc5ad0b5d5a29b45a730277e4 SHA-1: d1f0ebf82ee788fe5ca39395fdbad5a85b932cf4 SHA-256: f7f0d45f03281e65ab2812fc77f9a65299f17b54b5873e8553ac6fc38c901d4f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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 https://netcdn.online/app/406889139/master-coin-hack-apk-game-hack PDF link annotation
    • http://www.library.gkigadingserpong.org/repository/coin-master-70-spin-link-today_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/get-more-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-roblox-hair-to-wear_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-villages_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-game-pack-with-google-play-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-exchange-40-free-spins_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hack-tool-without-verification_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-firebird-card-free_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f58.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F58 24712 bytes
SHA-256: d821eaba17a9ea738cadaf94c118eeb864c78fc489c76b8f383e531a2f1f093c
font_01_sfnt_off00008791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8791 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off00009144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9144 17892 bytes
SHA-256: 41282dcb1c000e988ea8b2199b00347d54e117e16c55148ab4165d720f01bc1d

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