Malicious PDF — malware analysis report

Static analysis result for SHA-256 15dbea1aa40d2036…

MALICIOUS

PDF

46.7 KB Created: 2021-06-04 01:31:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 06c3806c14f0054cd2b114b56f8e12ab SHA-1: 30370944a0b661a8d5ef25072d464fb0d122d914 SHA-256: 15dbea1aa40d203657f4e041973a5f35ea25016f40c89d91b28ba53fe411e8cc
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links, with a primary URL pointing to a 'coin master free spin and coin link today' lure. The presence of a 'game hack redirector' heuristic and a 'password-protected archive lure' suggests an attempt to trick users into downloading potentially malicious content or visiting a phishing site. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-free-spin-and-coin-link-today-game-hack PDF link annotation
    • http://library.poltekkes-palangkaraya.ac.id/repository/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/how-to-hack-coin-master-game-ios_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id//repository/daily-free-spins-coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/coin-master-hack-apk-no-survey_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/what-is-a-robux_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id//repository/how-to-get-stuff-that-cost-coins-free-mcpe-master_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/how-to-get-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id//repository/coin-master-hack-without-verification-ios_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/coin-master-heaven-daily-free-spins-and-coins-links_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id//repository/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/minecraft-handbook_GM479516143.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id//repository/is-roblox-hacked_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/tiktok-free-3d_GM835599320.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/how-to-change-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/real-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005110.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5110 24776 bytes
SHA-256: 0b9a886d1a93367b7e289930b7b208914e6ad96a059b6f967a986401ab111410
font_01_sfnt_off00008954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8954 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off00009306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9306 18412 bytes
SHA-256: 5606d742d49c2f618a839db89fb2f395f675f912dcc06d31cfc3972fb9700339

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