Malicious PDF — malware analysis report

Static analysis result for SHA-256 683ba8231d51c3c9…

MALICIOUS

PDF

46.5 KB Created: 2021-06-04 02:38:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8bdeee68667d7b4f8b4ca65c2d159bc4 SHA-1: 9372698c09428f24229427da8cbb83166fe47c19 SHA-256: 683ba8231d51c3c9b150c7f4484bd7176bc532aa220cde3dcf7caa1404bffb54
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 0.9832

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/download-hack-coin-master-apk-game-hack PDF link annotation
    • http://katalog.stikesmukla.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/roblox-character-free_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-fun-hack_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/hack-coin-master-spin-android_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-jackpot-madness-hack_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/hackear-coin-master-android_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-heaven-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/gameoffice-net-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-to-robux_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/when-pokemon-go-free-download_GM1094591345.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-robux-real_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-hack-club_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-tool-hack_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_off000050a6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50A6 30140 bytes
SHA-256: b97c2c098b0d8290f544e2f42f105a54971e1adad16fe84e95696fefc70b3fc3
font_01_sfnt_off000092c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92C9 18472 bytes
SHA-256: 48f2fb6a54f4a1d4da48af3cad9101beb926a58239587b90eb535e02f3a3ea4e

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