Malicious PDF — malware analysis report

Static analysis result for SHA-256 d97cc98dc6e73e0e…

MALICIOUS

PDF

45.6 KB Created: 2021-05-11 07:36:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b4651f33ff484199a743049e06f63c0b SHA-1: a4bc88527ef89fcfdfdc1ed427d14accfdcd51a8 SHA-256: d97cc98dc6e73e0edc66dabc7254281c4018ae605317cb7727028068d8063ead
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 0.9507

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.xyz/app/431946152/rbx-hut-game-hack PDF link annotation
    • http://stikesyahoedsmg.ac.id/Digital_Library//repository/best-free-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library//repository/roblox-free-play-no-download_GM431946152.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library//repository/free-robux-come_GM431946152.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library//repository/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library//repository/free-spins-coin-master-site-wwwquoracom_GM406889139.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/free-coin-master-spins-2021-link_GM406889139.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library//repository/coin-master-fb-free-spins-link_GM406889139.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library//repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library//repository/roblox-army-robux_GM431946152.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library//repository/how-do-you-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library//repository/chisel-and-bits-mod-pe_GM479516143.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/free-robux-without-verification-or-survey_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_003_off00004b2a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B2A 26616 bytes
SHA-256: 52cabc37f4536252cf7da1a8eb204017602bc78fff33d49117667e5f30b8e8ff
font_01_sfnt_off000086fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86FE 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off0000910e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x910E 17812 bytes
SHA-256: e24951961dffee7128ae3d90f7f1153dbc58b347b85dc2bf38d5c1c57fa85777

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