Malicious PDF — malware analysis report

Static analysis result for SHA-256 072b4cfd86fca374…

MALICIOUS

PDF

36.4 KB Created: 2021-07-02 06:19:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7950b2276998dc1cc9360de4faeb1ca9 SHA-1: b4899e30d7c163d2befb18d4ae5d02b98eefc0ed SHA-256: 072b4cfd86fca37497a2312d3e6a9fb010c150e68a6825d1e7fff874e03c38be
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a document body that explicitly offers "Free Rubux Cheat Roblox" and "free spins" for games, indicating a lure for users to download potentially malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs further supports a malicious intent to redirect users to harmful sites. No scripts were extracted, but the overall pattern suggests a phishing or social engineering attack.

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/free-rubux-cheat-roblox-game-hack In PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-hack-tool-for-android_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/robloxhacks_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/hack-roblox-kali-linux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-spins-coin-master-2021-glitch_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/robux-hack-code-activation_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-coin-master-cards-link_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-now_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-hack-admin-commands-on-roblox-no-injector_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-free-skin_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/instant-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-make-a-badge-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/hacks-for-imillion-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/hack-to-get-money-in-gta-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-roblox-accounts-with-robux-and-obc-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-tokens-asssassin-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-hack-anyones-account-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-shark-bite-teeth-hack_GM431946152.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_002_off00003594.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3594 23028 bytes
SHA-256: e32af559334c41384eea0977f33b04ccedd2884bee97f98630b88710c69c5e46
font_01_sfnt_off00006945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6945 19060 bytes
SHA-256: 5b99a6cb48afd98567bda4d672a59ddb7cf02863d0f702912904609b9f909252

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