Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3cb978475d84a69…

MALICIOUS

PDF

35.0 KB Created: 2021-07-03 16:55:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5a7fab67e0c22231c5479949c2210615 SHA-1: 54ea6ef5490718ebe6321ce75c72e4197af387d1 SHA-256: b3cb978475d84a69ed86453bdc78718fc65c5ec5e1a36b1442dc4b9bcdbd1640
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-coins-link-game-hack PDF link annotation
    • http://mtsn-baranti.com/perpus/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/minecraft-bedrock-free-download_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-get-scar-free-in-mad-city-roblox_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-get-free-roblox-items_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/martian-lettuce-coin-master-free_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-get-admin-with-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/hack-mad-city-roblox-descargar_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/roblox-hacks-no-servays_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/freespincoin-masterlinkdownload_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-hack-apk-april-12-2021_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/robux-pastebin-hack-2021_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/roblox-script-executor-free-download-2021_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/hack-vehicle-sim-roblox_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-robux-codes-no-verification-2021_GM431946152.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_off000031fe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31FE 23328 bytes
SHA-256: 5404882b9c02f3269c9a05441837715b837101add21c9dbc3914ac89c92b8fdf
font_01_sfnt_off00006665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6665 18168 bytes
SHA-256: 7e3864b359ae4e20f98f554aea3d5366a72fce57ca0fb6405be6acd76bdcbaac

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