Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bc4ef99fc3f2ecd…

MALICIOUS

PDF

42.2 KB Created: 2021-05-19 09:09:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a48e367e8d14542f0b6881e14d782700 SHA-1: 13a3dfb2a0eba584293ddd489d3cefd1da610bd9 SHA-256: 7bc4ef99fc3f2ecdf06266af5c9def419e5340bbb43ac0f18ab6e6f44ece2d28
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 0.9971

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/minecraft-online-free-download-game-hack PDF link annotation
    • http://www.africanearthgroup.com/uploads/files/files/coin-master-spin-hack-link_GM406889139.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/how-to-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/blox-best-robux_GM431946152.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/http-bitly-coin-master-free-2021-spins_GM406889139.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/coin-master-spin-hack-trick_GM406889139.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/hack-coin-master-2021-pc_GM406889139.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/free-robux-come_GM431946152.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/roblox-weird_GM431946152.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/coin-master-70-spin-link_GM406889139.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/coin-master-hack-download-android_GM406889139.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/free-roblox-accounts-with-builders-club_GM431946152.pdfIn PDF document text
    • https://education.minecraftIn 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_003_off00004b41.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B41 24644 bytes
SHA-256: 8302ab67848b2d19bf2737e7181864b1bdfe5398bb74646e41dd42ec5e2e1875
font_01_sfnt_off00008275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8275 18292 bytes
SHA-256: a2a63f8c18687518d260bdaa10b8e62a526b9456f69b3d2706eff3b892369b89

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