Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e6f33ddbde22a4d…

MALICIOUS

PDF

46.3 KB Created: 2021-06-03 03:52:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 9b32bbf1010c852770d55266a1f71d74 SHA-1: 8f9731addbc4e13da8a600ead6bea32d94ad5781 SHA-256: 2e6f33ddbde22a4ddc06135246792025f93729f490a4fcceace22b822f131361
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising free game currency or hacks. The document body, though partially obfuscated, contains a prominent URL that aligns with the heuristic findings of a game hack lure. The presence of embedded URLs and the ML classifier's strong flagging indicate a high likelihood of malicious intent, likely to lead users to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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 https://netcdn.online/app/431946152/free-roblox-gift-card-game-hack In PDF document text
    • https://lib.stie-yai.ac.id/repository/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/coin-master-apk_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/coin-master-hack-app-android_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/ways-to-earn-robux_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/minecraft-complete-handbook_GM479516143.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-daily-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-free-hats_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/tiktok-views-free_GM835599320.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/master-coin-hack-mod_GM406889139.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_004_off0000544b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x544B 26528 bytes
SHA-256: 50db869d84a49641dde9c8cd945350cbc882439499be636846ddec61b98f2fec
font_01_sfnt_off0000919d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x919D 18572 bytes
SHA-256: d6dd878634c6e0bfa0573f8d07d8c04072d5223543faa3ff40eccc306bc8b9ad

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