Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b15758be99b2984…

MALICIOUS

PDF

33.4 KB Created: 2021-07-07 19:06:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c4cbda16dbbb009bc2d971c406f66673 SHA-1: a04d9009990dd1c25bdafff23d0af32399b7ab48 SHA-256: 8b15758be99b29847313899aba64618ce9ec99045baba3ef1b70e6e25be2cfba
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'game hack' generator, directing users to the URL http://netcdn.tw/app/431946152/hack-a-game-game-hack. This heuristic, combined with the ML classifier's high confidence, indicates a malicious intent to redirect users to potentially harmful content. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a social engineering tactic to trick users into visiting a malicious site, likely as part of a phishing or malware distribution scheme.

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.tw/app/431946152/hack-a-game-game-hack PDF link annotation
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/minecraft-alt-accounts-free_GM479516143.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/free-robux-giveaway-live-youtube_GM431946152.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/how-to-hack-into-drtraybloxs-account-roblox_GM431946152.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/how-to-hack-the-roblox-website_GM431946152.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/roblox-hack-tool-download-robux_GM431946152.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/watch-videos-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/mcpe-download_GM479516143.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/coin-master-free-spin-today-2021_GM406889139.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/how-to-earn-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/hack-acounts-roblox-site_GM431946152.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/harked-roblox-script-free_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_off00002f93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F93 21768 bytes
SHA-256: 5920af4b8d4f3388f2cc988421c2e1e2cf0f1e436a37b45350b3b44a6b1e5958
font_01_sfnt_off00005f62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F62 18332 bytes
SHA-256: ba9a5ca92ba82b06d62fb7d932d8411f4ef5b8c8ca9324ffa17e0e8336b0cdba

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