Malicious PDF — malware analysis report

Static analysis result for SHA-256 73f6228aee291c72…

MALICIOUS

PDF

49.5 KB Created: 2021-06-03 08:55:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7e5f6697685fd72f27b42d7a16a46c65 SHA-1: 12128b65eac458c196f70d42bbaf4e75104e2157 SHA-256: 73f6228aee291c72561929cbfa46fe438aa86306b667eb5007e072aeccd31d20
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 0.9796

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/431946152/roblox-tix-generator-game-hack PDF link annotation
    • https://opac.itp.ac.id/repository/coin-master-free-spins-link-october-2021_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-coins_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/get-free-robux-info_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-fencing-hack_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/www-roblox-com-robux_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-hack-xyz-apk-download_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-hack-unlimited-spins-game-download_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/clean-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-free-spins-for-iphone_GM406889139.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_off00005359.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5359 29668 bytes
SHA-256: 1518a8c2ccb2cce7285362c4f8bcc7c8aa740ba5eb3ef335f301d3b9e5e72fc4
font_01_sfnt_off000094c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94C3 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off00009eae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EAE 18236 bytes
SHA-256: c306490dc44d557a5a15fb05308447a7f7e02cb0664141b46cc1ed38f297bb82

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