Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d7f7811fb5c3d5c…

MALICIOUS

PDF

32.8 KB Created: 2021-07-20 08:02:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 78304dc7b671678ad6eadee0e4adee53 SHA-1: 2debbd67abd2e5fa6374127e5a5ced498a837f22 SHA-256: 1d7f7811fb5c3d5c802ce03f3833085b25a60df65e937242f259d72753f00aee
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 0.9900

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 http://netcdn.tw/app/431946152/free-robux-generator-no-verification-2021-game-hack PDF link annotation
    • https://komakinosite.jp/images/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://komakinosite.jp/images/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://komakinosite.jp/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://komakinosite.jp/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://komakinosite.jp/images/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • https://komakinosite.jp/images/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://komakinosite.jp/images/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • https://komakinosite.jp/images/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://komakinosite.jp/images/roblox-hack_GM431946152.pdfIn PDF document text
    • https://komakinosite.jp/images/minecraft-hack-mod_GM479516143.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
font_00_sfnt_off00002a7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A7B 22024 bytes
SHA-256: 6af4ef459e4b1e3a2925bbf55784f06b6a987a70e96ba3ecdc6e3b432ff6c781
font_01_sfnt_off00005b3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B3C 19188 bytes
SHA-256: c8334d64ceff0d271e1d4b51f19afa7d9c31307ce26db46c9e758d58655f0d17

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