Malicious PDF — malware analysis report

Static analysis result for SHA-256 399af3e47ddec465…

MALICIOUS

PDF

46.6 KB Created: 2021-06-04 01:34:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c7ada6b4efdbbaef1c081fb00038b071 SHA-1: 654e5491d090896ec54239489ffe1d3a87d0153a SHA-256: 399af3e47ddec465e7fbae5939763aa1424844a1c3b5e3181500dcff7ddcf589
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

Heuristics 4

  • 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.
  • 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-spins-app-android-game-hack PDF link annotation
    • http://library.yamasi.ac.id/repository/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-spins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/legit-coin-master-hack-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/roblox-free-pets_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-hack-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-hack-tool-exe_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-free-box_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coins-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-server-hack_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/minecraft-anarchy-server-no-hacks_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-hack-unlimited-spins-apk_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-adopt-me-free-pets_GM431946152.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_off000050a4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50A4 24960 bytes
SHA-256: b19918c20118843e8a2656e7d7818fc39f467225588017c0270c682390db7c00
font_01_sfnt_off00008a74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A74 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off00009427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9427 18060 bytes
SHA-256: 7f8980b6f3213b204c7b050e62c653166806b65682437d624869b2fc7a4cb6a7

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