Malicious PDF — malware analysis report

Static analysis result for SHA-256 796e58b630e6f7aa…

MALICIOUS

PDF

44.5 KB Created: 2021-06-03 04:53:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f48953f9d79189472f1015c401e2ea0a SHA-1: 496f6fb48a60fa09c861d5459920bd7bc90e80cd SHA-256: 796e58b630e6f7aa60fdd8141bb56a0e9937a2bf03adabc0d530011eb7313e06
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link disguised as a 'free generator / game hack' lure, directing users to a suspicious URL. The document body, though partially corrupted, also contains this URL and other similar links, reinforcing the social engineering aspect. The ML classifier also flagged this PDF as malicious, indicating a high probability of malicious intent.

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/free-spin-coin-master-hack-2021-game-hack PDF link annotation
    • http://library.asih-husada.ac.id/repository/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/getrobux-come_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/link-for-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/promo-codes-for-free-robux_GM431946152.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_off000052c3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52C3 24468 bytes
SHA-256: a1ba0bd1a09a30e6ab9c12ce170f96759a0690d3d9a86415a6285851092e9342
font_01_sfnt_off00008aea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AEA 18456 bytes
SHA-256: fb2d798100dc09ab9990163d1a71849b6ff749ff3ac9d3c750144c56980b6f28

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