Malicious PDF — malware analysis report

Static analysis result for SHA-256 f41d9d2fcf93371b…

MALICIOUS

PDF

44.0 KB Created: 2021-05-10 21:54:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a348baa7f26b7cb2a8563985c90d6a87 SHA-1: 1012bd832bf4c2b050c69b03f92e99045ddf5500 SHA-256: f41d9d2fcf93371b5dc95165a22fea691e3800b4f46a093a68cf2081b22ce7ad
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 0.9648

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/479516143/free-24-7-minecraft-server-game-hack PDF link annotation
    • https://www.fubode.org/images/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.fubode.org/images/coin-master-hack-version-download-ios_GM406889139.pdfIn PDF document text
    • https://www.fubode.org/images/is-coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • https://www.fubode.org/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.fubode.org/images/coin-master-hack-no-verification-no-signup_GM406889139.pdfIn PDF document text
    • https://www.fubode.org/images/roblox-games-free_GM431946152.pdfIn PDF document text
    • https://www.fubode.org/images/hack-master-coin_GM406889139.pdfIn PDF document text
    • https://www.fubode.org/images/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.fubode.org/images/free-roblox-com_GM431946152.pdfIn PDF document text
    • https://www.fubode.org/images/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • https://www.fubode.org/images/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • https://www.fubode.org/images/coin-master-free-foxy-food_GM406889139.pdfIn PDF document text
    • https://www.fubode.org/images/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • https://www.fubode.org/images/how-do-you-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.fubode.org/images/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.fubode.org/images/apps-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.fubode.org/images/get-free-spins-coin-master-october-2021_GM406889139.pdfIn PDF document text
    • https://www.fubode.org/images/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
    • https://www.fubode.org/images/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.fubode.org/images/how-to-get-a-lot-of-robux_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_003_off000047fe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47FE 24916 bytes
SHA-256: 597bdf12b629a98fc137a9d12210963089a0cc021de692669543ad322454f4f4
font_01_sfnt_off00008095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8095 2824 bytes
SHA-256: 61b3a573627d4f03d30684157e1627da3b4499cefab0fdf17b45999135b0250b
font_02_sfnt_off00008a3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A3C 17924 bytes
SHA-256: 6d441e79e96f2496e7d363a8fd4eac2c27151cb1acb88a4e303d16644f1cdf17

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