Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1076debc69b0070…

MALICIOUS

PDF

34.6 KB Created: 2021-06-26 23:17:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 6b1eb3fc33a4d7828273e31538143d9b SHA-1: 4839f89df80600afaaed73fd827db2bf49bda2eb SHA-256: f1076debc69b007048463344bb1cc50317aa4acaf313e904295f30b7e9264df1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free in-game items and hacks to trick users into visiting malicious URLs. The primary URL, http://netcdn.co/app/431946152/how-to-get-free-stuff-on-roblox-android-game-hack, is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at driving traffic to potentially harmful sites.

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.co/app/431946152/how-to-get-free-stuff-on-roblox-android-game-hack In PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-hack-on-roblox-jailbreak-xbox-one_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/8x9roblox-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-spins-coin-master-2021-app_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/comment-avoir-des-robux-gratuit-sans-hack_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-coin-master-coins-2021_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-gui-hack_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/buzz-the-bee-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-items-for-free-on-roblox-instantly_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/5-games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/today-free-spin-coin-master_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
font_00_sfnt_off000031a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31A6 21744 bytes
SHA-256: 7389ef3d2d866f284cdaa20eb2dbb77e30a193b15e6b1bfe5dc0882a00f50f9f
font_01_sfnt_off00006142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6142 19352 bytes
SHA-256: d183c0b12ff1d43bcafa66bf7355db66d449e665155ec9f8e7434bd47fc82c26

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