Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b6ae8a94651d7f8…

MALICIOUS

PDF

42.6 KB Created: 2021-06-03 05:38:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: e0439500d1c2a79abb30e5d09c9b075b SHA-1: 685345d59deda31b4664f5a3869348cc2d42eebe SHA-256: 6b6ae8a94651d7f85644bdd84a3a0804e727324190b0ca94e19858c74bca9cae
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and cheats. The document body and embedded links suggest a lure to download potentially unwanted or malicious software. The presence of multiple redirector links indicates a deliberate attempt to obfuscate the final destination and distribute malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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/406889139/coin-master-attack-hack-apk-game-hack In PDF document text
    • http://lib.icbc-indonesia.org/repository/robux-download_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/pubg-uc-not-received_GM1330123889.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/free-hair-roblox_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/coin-master-game-hacking_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/daily-spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/coin-master-root-hack_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-hack-app-android_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/coin-master-free-spins-ios-2021_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-cheat-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/best-free-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/free-minecraft-servers-to-join_GM479516143.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_off00004bfb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BFB 24784 bytes
SHA-256: 1b65efff18a749ba0ad334c40935dad4f470b0855fbe9c1d7c2381dc1fca6b47
font_01_sfnt_off000084b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84B5 17892 bytes
SHA-256: e6840f3bb6a03ec6cfdeee84f4ec8c5107362a4db383bde52e6abc5845af31eb

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