Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3f5e83b5614b83a…

MALICIOUS

PDF

34.4 KB Created: 2021-07-03 23:42:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: cfa674ac3f5d72214fb63b627ce56608 SHA-1: 5938b735888372d3a4fb4fb1a6a26e0e6c758e10 SHA-256: f3f5e83b5614b83a30b9b4336ee148f568491985c90e8c49800dfa5ccfaedaed
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generators' and 'game hacks' for popular games. The primary lure URL is http://netcdn.tw/app/406889139/coin-master-daily-spin-free-game-hack, which is identified as a malicious redirector. The document body and embedded URLs suggest a phishing or scam attempt to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/coin-master-daily-spin-free-game-hack In PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-spins-on-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/wwwcoin-master-free-spincom_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-free-domino-crown_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-coins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-web-store-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/sex-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/easy-robux-today-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-roblox-no-plsy-stor_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-cheats-for-money-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/change-roblox-username-free_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-generator-download-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-how-to-get-free-robux-obby_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-hack-roblox-2021-april-may-new_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-game-hack-app_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30BD 22528 bytes
SHA-256: 3ec81e95df63a7782e23c37b7b776f50fd12872c875c9160fe2de87be25a3c2a
font_01_sfnt_off000062e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E4 18596 bytes
SHA-256: 4bd887bddad3707660fa4e91161c1a16423faf42318738ff8904c415139aa447

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