Malicious PDF — malware analysis report

Static analysis result for SHA-256 d16ae1386e49410e…

MALICIOUS

PDF

44.7 KB Created: 2021-06-04 03:26:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: d3fe857a27870f851a88713631fadd99 SHA-1: e5e3f1c395f9c739f98f7ed289795993588e1ef3 SHA-256: d16ae1386e49410e21cedb1c25174f7224566fca52c09f43755f7c2039915f85
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains multiple links to known malicious redirectors and lures users with promises of game hacks and free currency. It also includes a fake download button and references remote support tools, suggesting a social engineering attempt to trick the user into downloading potentially unwanted or malicious software. The primary malicious URL identified is https://netcdn.online/app/479516143/minecraft-pe-016-0-apk-download-free-game-hack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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/479516143/minecraft-pe-016-0-apk-download-free-game-hack In PDF document text
    • http://library.itekes-bali.ac.id/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-coins-link-facebook_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spins-through-coin-pop_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/pubg-uc-voucher_GM1330123889.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/tiktok-free-minecraft_GM835599320.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/minecraft-switch-free_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/tiktok-free-fans_GM835599320.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-400-spins-coins-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-spin-link-today_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_off00005137.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5137 24676 bytes
SHA-256: 3458d67853cc42eaf54716f58e60b515e967a56f0d6e4eaa132690ed2f0ac426
font_01_sfnt_off00008937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8937 19236 bytes
SHA-256: a63dd01408f91a6891b380631e9b9ef38a24a18d267ddcf0deb2880c3b0dbcab

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