Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d9584a5f86079fe…

MALICIOUS

PDF

32.3 KB Created: 2021-07-04 20:41:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d1ae0fd7d2a131bf599ee9e2d665cb18 SHA-1: c1b05ba9d6735dd8477c53b7aeb4284c86cfe29d SHA-256: 4d9584a5f86079fe6cdd73af6a9c8bfaae2523a705ab75f00c3237803ec5b3e3
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 0.9824

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/406889139/how-to-hack-coin-master-using-es-file-game-hack PDF link annotation
    • http://pustaka.smpmuh2yk.sch.id//repository/oprewards-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/robux-hack-easy-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/coin-master-download_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/coin-master-redeem-code-free_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/pubg-770-uc-ne-kadar_GM1330123889.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/roblox-pics_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/haktuts-coin-master-today_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/robux-only_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/pgsharp-pokemon-go-free-key_GM1094591345.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/generator-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/coin-master-hacks-for-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/free-mod-apk-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/coin-master-spin-hack-trick_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/hacks-master-coin_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/coin-master-hack-version-download-2021-android_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/roblox-clover-online-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/how-to-get-free-cards-on-coin-master_GM406889139.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_off0000297d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x297D 22296 bytes
SHA-256: b7aa7dc1c8c9d2e0eb8c76fa35276fd7104eab706325bb7c023a855042ce58c5
font_01_sfnt_off00005b16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B16 18592 bytes
SHA-256: 9f5be4458162f88b8106d8459438f6a033b33521919b4f61ce35f018954fc42f

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