Malicious PDF — malware analysis report

Static analysis result for SHA-256 324a97652619988a…

MALICIOUS

PDF

44.0 KB Created: 2021-06-03 07:51:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 3ff1d4f1fb30cb583858cc8969f40a31 SHA-1: b0058600e7c56065595fd535a9d5958c74d87791 SHA-256: 324a97652619988a4e1178453c928ab1c19c29a5d8384e7e313d70d48ce47c3c
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one that redirects to a known malicious infrastructure. The document body and heuristics indicate a lure related to 'game hacks' and 'free generators', combined with a 'browser extension installation lure'. This suggests the primary goal is to trick the user into visiting a malicious site, likely to download further malware or steal credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/406889139/como-hackear-coin-master-en-espaol-game-hack In PDF document text
    • http://pustaka1.unindra.id/repository/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/free-robux-come_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/hack-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/how-to-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/coin-master-free-link-blogspot_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/coin-master-daily-free-spins-link-today-blog_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/coin-master-free-pet-snacks_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/robux-no-verification_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/how-to-get-free-spins-on-coin-master-android_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/appsmob-coin-master-hack_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_off0000518c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x518C 24596 bytes
SHA-256: 55c35e44d59103cdd55c222c6d2c55436f855e7c721b41b0d9c0a8e2af66a2c4
font_01_sfnt_off000089bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89BD 18224 bytes
SHA-256: 123f8386315a91293958179ffe58ecd8d69104faea04a921c44476c066c42c52

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