Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4ed8b222020ccfb…

MALICIOUS

PDF

42.2 KB Created: 2021-05-19 22:30:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 081b8a160fe78f611a34bbc64d8025f3 SHA-1: 2500a4b0e4f9c86a21a700245ff4125fc73e18eb SHA-256: b4ed8b222020ccfb71d94e931a72a109fe596e5c5c8a9e499e49e4a1f6ad2695
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 0.9971

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/406889139/coin-mast-hacks-game-hack PDF link annotation
    • https://elearning.mtsn2mdn.sch.id/__statics/gudangsoal/files/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn2mdn.sch.id/__statics/gudangsoal/files/public-enemy-sun-prairie-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2mdn.sch.id/__statics/gudangsoal/files/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn2mdn.sch.id/__statics/gudangsoal/files/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2mdn.sch.id/__statics/gudangsoal/files/coin-master-coin-link_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2mdn.sch.id/__statics/gudangsoal/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2mdn.sch.id/__statics/gudangsoal/files/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2mdn.sch.id/__statics/gudangsoal/files/roblox-heroes-online_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2mdn.sch.id/__statics/gudangsoal/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2mdn.sch.id/__statics/gudangsoal/files/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2mdn.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2mdn.sch.id/__statics/gudangsoal/files/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2mdn.sch.id/__statics/gudangsoal/files/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2mdn.sch.id/__statics/gudangsoal/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2mdn.sch.id/__statics/gudangsoal/files/free-coins-for-coin-master-blogger_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2mdn.sch.id/__statics/gudangsoal/files/free-robux-just-click_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2mdn.sch.id/__statics/gudangsoal/files/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn2mdn.sch.id/__statics/gudangsoal/files/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2mdn.sch.id/__statics/gudangsoal/files/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2mdn.sch.id/__statics/gudangsoal/files/coin-master-mod-version-free-download-2021_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_003_off00004a9d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A9D 25252 bytes
SHA-256: d1e691268e8dd33aea9b42920718344c93c43236fb599755f549c25bf17bf3fc
font_01_sfnt_off00008456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8456 17716 bytes
SHA-256: 777b684355b1eef5a972c4758674727e521bcb83e374608eb379fd1ca070469a

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