Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad69e504e4c6f8dd…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 23:11:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: fd13590ea3592b6d0d69ccdf2c308934 SHA-1: 628737f9aadde161703222df8580b44e3d5b4898 SHA-256: ad69e504e4c6f8dd74ea6ae77df1f11f5c027b4d34e9b7100966d8d1436525a3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, using the promise of game hacks and free in-game currency to entice users. It contains multiple links, including one to known malicious redirector infrastructure at http://netcdn.tw/app/406889139/coin-master-free-spin-link-app-game-hack. The document body and embedded URLs suggest a phishing or scam campaign related to popular online games.

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/406889139/coin-master-free-spin-link-app-game-hack In PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-game-for-pc-free-download_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/how-to-get-hacks-in-roblox-stuicd_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-fun-hack_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-tiktok-comments_GM835599320.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-minecraft-codes-2021_GM479516143.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/roblox-video-proof-for-hacks_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/minecraft-client-download_GM479516143.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/roblox-cheat-speed-run-4_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-game_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-20219_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-shield-hack_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/www-coin-master-hack-tk_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-no-offers_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
font_00_sfnt_off00002f35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F35 22468 bytes
SHA-256: 0b3598e3beb53dc85544b0eec1c8df54ecabad66482e1ee67cdbbc6e3a73ff60
font_01_sfnt_off00006137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6137 18344 bytes
SHA-256: d77f5968ee6f139457a13e9b4bf1826200ab268d3ceb16018ab347131930a957

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