Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fa51fd08ad39dd8…

MALICIOUS

PDF

55.3 KB Created: 2021-06-07 10:49:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 894d43b30d1ecc932c2c6db798b28424 SHA-1: 6c03d91e9bdb7ae67a35b0351f2e27a59b8e2464 SHA-256: 5fa51fd08ad39dd8033fa6d8400be11aae9064cff2d46a67e1c61faa724c7c12
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacking, directing users to a suspicious URL. This URL, along with numerous other similar URLs found in the document, likely serves as a landing page for phishing or malware distribution. The ML classifier also flagged this PDF as malicious, increasing confidence in its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9649

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.tw/app/431946152/how-to-hack-in-roblox-assassin-game-hack PDF link annotation
    • http://vcelarskepotreby.org/images/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/how-to-get-free-roblox-hair_GM431946152.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/hack-coin-master-game-apk_GM406889139.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/how-to-legally-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/robux-free-online_GM431946152.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/archery-master-3d-unlimited-coins-hack_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_004_off0000540e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x540E 31760 bytes
SHA-256: b503f802f4d0b4b670575f5a95f18da4d4096dcb514b50749e47cbabf521bd4c
font_01_sfnt_off00009a5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A5D 8132 bytes
SHA-256: e6d68e720ea5acf9dccbf7ffde18db6f65c62a99ab7725aa43e30329033a7787
font_02_sfnt_off0000b54a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB54A 18468 bytes
SHA-256: 56165ff0613e4bbbe7ec2723a50e93aaf4a0c24c7f38a8230078ee04769e00ab

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