Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b3738361f46ed51…

MALICIOUS

PDF

33.6 KB Created: 2021-07-05 09:51:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b4663307a0fe51e713e694356d9a5015 SHA-1: 3d51618d1b0174e7c1a863d380a8d106f7668fb7 SHA-256: 8b3738361f46ed518979cf43468546cf5a397111dcf6c08660abc6f3a6d40301
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to external websites, including a known malicious redirector at http://netcdn.tw/app/431946152/get-roblox-for-free-game-hack. The document body and heuristics indicate a lure for game-related cheats, likely to facilitate the download of a second-stage payload or lead to a phishing site. No scripts were extracted, but the embedded URLs and redirector findings strongly suggest a malicious intent.

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/get-roblox-for-free-game-hack In PDF document text
    • http://library.umla.ac.id//repository/freerobuxhack-us_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-hack-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/can-pokemon-go-free-pokeballs_GM1094591345.pdfIn PDF document text
    • http://library.umla.ac.id//repository/what-tiktok-free-movies_GM835599320.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-online-hack_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-spins-coin-master-april-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-in-app-purchases_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-hack-in-items-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/gaming-dunia-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-bedrock-download_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-free-robux-without-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-dominus-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-generate-free-robux-hacks_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/cheats-coin-master-free-spins-and-news_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-pubg-uc-carding_GM1330123889.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_off00002e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E9B 21936 bytes
SHA-256: df0f7bd13c70e9c109b5842d3984e7312cf6f5da37fed8055b551999b72c130c
font_01_sfnt_off00005ed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED9 18752 bytes
SHA-256: ac094eb52ccb986f6b44c8fe8172adec631737b698f2a1f393908779c64ca42c

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