Malicious PDF — malware analysis report

Static analysis result for SHA-256 4244dcf5dae7053a…

MALICIOUS

PDF

43.5 KB Created: 2021-06-04 03:56:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 35236574ca5b581677357a46392fdb09 SHA-1: 44126ac2a78afbced09cde3eba5b143204725be5 SHA-256: 4244dcf5dae7053a40e610dad18b780d66f6e816670d33ec9d14ffbbd47f2c41
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one pointing to 'coin-master-gold-cards-hack-game-hack', which is a common lure for phishing or malware distribution. The ML classifier also flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to game hacks and generators, reinforcing the lure. The primary attack vector appears to be directing users to external URLs that likely host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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-gold-cards-hack-game-hack PDF link annotation
    • http://library.stieyapan.ac.id/repository/robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-do-you-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-facebook_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-minecraft-texture-packs-java_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-download-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-cheats-for-free-spins_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/google-how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-group-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-hackers-list_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/roblox-avatar-editor-free_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/united-gaming-net-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050f0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50F0 24244 bytes
SHA-256: ead175e93812869404190f786dce0c9e44e565f8430479d812ddc6cc1640ccb6
font_01_sfnt_off00008827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8827 17964 bytes
SHA-256: adb4edbf0c57abdeeb225f0bd422abdfe2e9b1ff4eb8b752c2c204cd3e2141b0

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