Malicious PDF — malware analysis report

Static analysis result for SHA-256 84633d83ae55d19e…

MALICIOUS

PDF

46.6 KB Created: 2021-06-03 10:53:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 920d97207afeeee573c226351d65f467 SHA-1: 9f96cb6adecace76bb40aca37e8385be4452093a SHA-256: 84633d83ae55d19edc673b49d5b4a90fae0fa0d04bf01461041fbe4a6f1e83f7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to redirectors that masquerade as game hack generators, aiming to trick users into downloading potentially malicious files. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs and a download button lure further support this assessment. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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 https://netcdn.online/app/479516143/toolbox-mod-game-hack In PDF document text
    • http://e-library.akademitelkom.ac.id/repository/coin-master-gold-cards-hack-english_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/infinite-robux_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/free-appsfor-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/free-roblox-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/is-roblox-free-on-nintendo-switch_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/coin-master-hack-using-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/wurst-18_GM479516143.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/coinmaster_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/free-spins-coin-master-october-17-2021_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
stream_004_off000054fa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54FA 31284 bytes
SHA-256: 36230b3198a26df3bb25a08b238b23690d15aaf4088e102f2725dfd53400c221
font_01_sfnt_off00009515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9515 17872 bytes
SHA-256: ad6b4d8381eadec3c93ad1df5f4e1279c2235c5ac1e30c542200a475642cf7e3

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