Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5a4fcf73c8bfb73…

MALICIOUS

PDF

34.4 KB Created: 2021-07-06 08:32:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: b93da4e967dbb6e31b26915d6415d6f8 SHA-1: 356bab71984ec5e813c2d285384a4825c84d44a4 SHA-256: c5a4fcf73c8bfb73ff30c8328b9fabf7b975d5e827ddf674f60b0f1464921166
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 0.9980

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-free-spins-app-android-game-hack PDF link annotation
    • http://library.forda-mof.org/katalog/repository/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/a-free-dominus-roblox-catalog_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/hack-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-hacked-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/cmo-puedo-hackear-roblox-en-computadora_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-codes-generator_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/game-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/minecraft-free_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-send-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-spins-generated-from-coin-master_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/fake-free-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-2021-free-spins-link_GM406889139.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_off00003190.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3190 22452 bytes
SHA-256: 5fa36b68de949066ebf84bbc92a35eae18e46dfd7d24b53473d4daacc865d3e9
font_01_sfnt_off000063a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A5 18348 bytes
SHA-256: 3aa320ccb9cb7c087074e4ef079b33192d8e05703f275142029ef104db56ac85

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