Malicious PDF — malware analysis report

Static analysis result for SHA-256 58c96d0d925f9693…

MALICIOUS

PDF

34.2 KB Created: 2021-06-18 03:05:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e8ff3ef180e24c065e627a82be77f556 SHA-1: 5912b13fb09bb3acbf0690202fbff29b5989dda1 SHA-256: 58c96d0d925f96933fff81ecfa43f7a46ab87d7d2955e282b11acdfae8247276
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links and a lure related to game hacks and free currency, directing users to potentially malicious websites. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs and a 'download button' heuristic further supports a phishing or malware distribution attempt. No scripts were extracted, but the document structure and embedded links are indicative of a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.co/app/431946152/inject-hack-robux-2021-game-hack PDF link annotation
    • http://arch-centr.ru/images/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://arch-centr.ru/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://arch-centr.ru/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://arch-centr.ru/images/free-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://arch-centr.ru/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://arch-centr.ru/images/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://arch-centr.ru/images/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://arch-centr.ru/images/free-spin-codes-coin-master_GM406889139.pdfIn PDF document text
    • http://arch-centr.ru/images/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • http://arch-centr.ru/images/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://arch-centr.ru/images/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://arch-centr.ru/images/hacks-for-roblox-backpacking-beta_GM431946152.pdfIn PDF document text
    • http://arch-centr.ru/images/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • http://arch-centr.ru/images/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://arch-centr.ru/images/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://arch-centr.ru/images/coin-master-tips_GM406889139.pdfIn PDF document text
    • http://arch-centr.ru/images/download-roblox-outfits-for-free_GM431946152.pdfIn PDF document text
    • http://arch-centr.ru/images/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • http://arch-centr.ru/images/coin-master-hack-2021-without-verification_GM406889139.pdfIn PDF document text
    • http://arch-centr.ru/images/hack-de-roblox-2021_GM431946152.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_off00002f37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F37 22068 bytes
SHA-256: c571d3d10865bffdc5b7863824538702259f522aeed3eda65a1a34cee83ba021
font_01_sfnt_off00005fd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD1 19232 bytes
SHA-256: 048c8fa78336ef648b3ffcf0d994c8bf3afc78f8d05f56bcaf6b8cc9e3e70491

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