Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3e333fc00645bf3…

MALICIOUS

PDF

35.9 KB Created: 2021-06-28 09:43:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 33b8ab9e435c69d77a80dd1d5dc7edd5 SHA-1: d2bae888095a3f3cc22e81bdf10e3160342a7561 SHA-256: f3e333fc00645bf328bb6d8d8a0c8071ccfd323e176f18786e663e8fc2cf5523
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.co/app/431946152/free-robux-fan-club-game-hack PDF link annotation
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/roblox-how-to-put-gear-on-free_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/robux-prices_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/roblox-gift-card-free-codes_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/roblox-lumber-tycoon-2-hacked-version_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/best-all-round-roblox-gui-script-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/coin-master-hack-reddit_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/free-robux-generator-android_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/minecraft-mojang-free_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/how-to-use-an-illuminati-skybox-hack-on-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-and-coins-on-coin-master_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
font_00_sfnt_off0000358b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x358B 22596 bytes
SHA-256: 910c85ad28fcb71c3bb3e0668e0ca7e8b1087207dd1451b71e2785d1a05f43a7
font_01_sfnt_off00006846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6846 18788 bytes
SHA-256: ce67dc0f0c9aac3fd0e1d8d48ea31facd14f53493876dcc01008c760816273ff

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