Malicious PDF — malware analysis report

Static analysis result for SHA-256 41510df13324595b…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 11:01:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 60256e652e9221608a3beab877ca623d SHA-1: 4f7a5e675400ed4b8595f06123f79fc7dae25a54 SHA-256: 41510df13324595bba750e5112511884c2e4f998226799c3e125dd66985add65
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free game items, specifically mentioning 'free Minecraft account and password generator' and 'game hack'. It embeds a URL that redirects to malicious infrastructure, as indicated by the PDF_GAME_HACK_REDIRECT_LURE and PDF_MALICIOUS_REDIRECTOR_LINK heuristics. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be a phishing lure leading to a malicious redirector.

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/479516143/free-minecraft-account-and-password-generator-game-hack In PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/robux-gratis-sin-hacks-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/what-is-the-best-free-for-all-roblox-game_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-connection-lost-hack_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-more-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/hack-de-counter-blox-roblox-offensive_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-free-spins-daily-link-updated_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/can-you-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-hack-tool-free_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-strategy_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/using-cheat-engine-on-roblox-bloxburg_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/rbx-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-robux-hack-without-offers_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/minecraft-apk-download-v1-144-2-free_GM479516143.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_off000032c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32C5 22308 bytes
SHA-256: ddc88d4aca39a7dbde13ec84f4a9512eff39cbef67258cfead9b1e3ad3bb76f9
font_01_sfnt_off00006478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6478 18628 bytes
SHA-256: de06f09722a9c42f09fb0709cd7344bbebd04adb34a3467d8ebdf209ae6f7142

Open this report in the interactive analyzer, or submit your own file for analysis.