Malicious PDF — malware analysis report

Static analysis result for SHA-256 88d1da8d427f4a48…

MALICIOUS

PDF

45.9 KB Created: 2021-06-04 02:51:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 201733a72507ee517fc4dcb9e7daa27f SHA-1: ddb00b5e5af2bff030ddca3c2615b7a9b5e6a67a SHA-256: 88d1da8d427f4a48ca74474c6f13bbe5a88f200aafb98823b617595ca5197144
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-confidence heuristic indicating it links to a game hack generator, a common lure for malicious content. The document body and embedded URLs reinforce this theme, pointing towards a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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 https://netcdn.online/app/406889139/coin-master-hack-generator-game-hack PDF link annotation
    • http://opac.kolejkrim.edu.my/repository/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/what-is-exploiting-in-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-free-robux-the-real-way_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/minecraft-app-free-download_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-fan-club_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-spins-coin-master-october-13-2021_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/easypoints-gg-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-spins-coin-master-links-no-human-verification_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/freespinandcoin-blogspot_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000518f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x518F 24356 bytes
SHA-256: 24de077f4231f6e1c8440a9bc09a15b3db99b51f7fffcf3da99a2e016a669f62
font_01_sfnt_off00008896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8896 2824 bytes
SHA-256: a0d6c1ef1f7405ab05245801e4abbc2877925f97898db53811df9ab010e978fa
font_02_sfnt_off00009234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9234 17716 bytes
SHA-256: b5038ced4ab316a7f74842444eb7c28ee9c11b1798bcdca0ea22787b41e5f9ea

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