Malicious PDF — malware analysis report

Static analysis result for SHA-256 90dbf67d61a4714c…

MALICIOUS

PDF

35.7 KB Created: 2021-07-04 20:22:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4008ebac49b42484080d14834e1708ac SHA-1: 90f961882ce24686e0b848fdf9f1c5c6ad950bf4 SHA-256: 90dbf67d61a4714cd11881a37ba26f99806e4e31463f49865aba32101b38973d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to websites that promise free game items and hacks, such as 'free robux' and 'game hack' generators. One primary URL, http://netcdn.tw/app/431946152/microsoft-roblox-rewards-game-hack, is identified as a malicious redirector. The document body and heuristics indicate a lure for users interested in popular games, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/431946152/microsoft-roblox-rewards-game-hack In PDF document text
    • http://lib.akper17.ac.id/repository/coin-master-100-free-spins-link_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/hack-master-coin_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/roblox-hack-kohls-admni-house-script_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/minecraft-116-free-download_GM479516143.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/minecraft-client_GM479516143.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-to-download-wurst_GM479516143.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-to-get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/pokemon-go-free-promo-codes-march-2021_GM1094591345.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/coin-master-link-app_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/robux-hacks-real_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/what-games-give-you-robux_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_off000030c8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30C8 23456 bytes
SHA-256: 7ea5c3327d9743202d6bd590f0c2b47dcb9c392698240834ed0ee8e62bdf8b42
font_01_sfnt_off000065f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F7 19244 bytes
SHA-256: 15236a9164adcceeeabc7c563dc8d3c1b4330ca6f2c8a0eb4af9903fd5553319

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