Malicious PDF — malware analysis report

Static analysis result for SHA-256 50ee5ea2c4896616…

MALICIOUS

PDF

33.9 KB Created: 2021-07-08 23:26:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 916471321c36a060d617ef2b9122238b SHA-1: 8c6bce34d030ba94cb989fc9b5b10767ba43b83d SHA-256: 50ee5ea2c4896616251197e9684ce5922bbe625529d80dc3e1c54f8d067efda3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links, including one to 'netcdn.tw', which is flagged as a lure for game hacks and redirects. The ML classifier also strongly indicated maliciousness. The document's content and heuristics suggest it is designed to trick users into clicking malicious links, likely leading to malware download or further phishing attempts.

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/479516143/free-minecraft-skins-pc-game-hack PDF link annotation
    • http://perpus.smkn1pemangkat.sch.id/repository/roblox-the-crazy-elevator-free-toilet-dlc_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/coin-master-free-cards-link-2021-today_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/how-to-sign-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/how-to-cheat-in-roblox-lumber-tycoon-2_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/rbxdemon_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/earn-robux-online_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/free-vip-server-roblox-saber-simulator_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/minecraft-free_GM479516143.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/coin-master-free-pet-food-links_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/pubg-uc-gift-card-free_GM1330123889.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/village-coin_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/how-to-get-hacks-on-minecraft_GM479516143.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_off000031fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31FD 21964 bytes
SHA-256: 355aa25094eac9a561e1a98166428d593f2d8811116e70b808d07561f730ab43
font_01_sfnt_off0000626d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x626D 18180 bytes
SHA-256: 03bbaca276f4ce07c12aa831bba89cfcc4ebeeef430a8e21d06434038c5cc938

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