Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dbc1ac1f6b97507…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 17:52:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 14c8cc190347f5ae9c4c9cf3ce140925 SHA-1: 3517a319cab3321ec680e8f364fa251add6e80fe SHA-256: 9dbc1ac1f6b97507522537205d642278d07ce8d47fc05cb4aacb2c3938128bfa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as "game hacks" and "free generators." The primary lure is a "how to hack Roblox games" page, which redirects to a suspicious domain. This indicates a social engineering attack designed to lead users to potentially malicious websites for further exploitation or credential harvesting.

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/431946152/how-to-hack-roblox-games-no-downloads-2021-game-hack In PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/roblox-online-free_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/roblox-online-free-no-download_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/win-free-robux_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/roblox-free-model-roillercoaster_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/tiktok-free-100-followers_GM835599320.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/what-games-give-you-robux_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/descargar-hacks-en-roblox-2021_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-spins-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/mcpe-master-hack-unlimited-coins_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/does-coin-master-hack-work_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_off00003067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3067 22912 bytes
SHA-256: dc8bb7ec29fc8f9bab06bc1c9f7530bde7fab0a4f2670f52e75d8b912935e037
font_01_sfnt_off00006329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6329 19640 bytes
SHA-256: 54b6afb65fbb9fd49ae211f6f3082038455e42461a330867f95b980fe886d44e

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