Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cbdb97b22948a88…

MALICIOUS

PDF

40.3 KB Created: 2021-05-21 00:40:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 10fb9007fd9b847353d0a8a4f451f497 SHA-1: 30c072d44fd5bc99e1d2d8c13dac80e81e1ecf65 SHA-256: 9cbdb97b22948a8881a3aa1f1c8a41b8d9ff7305d5b73c21e2b1611fe1b33b96
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 0.7877

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.xyz/app/431946152/how-to-hack-any-roblox-account-game-hack PDF link annotation
    • https://tckontrola.hr/files/coin-master-free-spins-fb_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/coin-master-hack-apk-ios_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/coin-master-daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/hack-coin-master-online_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_002_off000034d0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34D0 26176 bytes
SHA-256: 61df5240b22bb040491922a8634d43cc54be83d44b6223dfc68061e091f03a64
font_01_sfnt_off00007077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7077 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00007a27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A27 18772 bytes
SHA-256: d5ac01ba848f85c7af00746e0b4ab9643e0d1d2f53353368de6e0e250a854553

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