Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab10c9a3f56bb2f9…

MALICIOUS

PDF

35.5 KB Created: 2021-06-25 21:21:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b339b6025bdf0a5994056519059132f1 SHA-1: dfc22e77653ae3098ba87471262429400bc250a4 SHA-256: ab10c9a3f56bb2f92826d95984120616aaf18a2babd1fce636597b76d3e5d112
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free Robux' generators for Roblox. The heuristic firings indicate that these links are associated with known malicious redirectors and game hack lures. While no scripts were explicitly extracted, the document's structure and embedded URLs strongly suggest a phishing or scam attempt designed to lead users to potentially harmful websites.

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-can-you-get-free-robux-on-laptops-on-roblox-game-hack In PDF document text
    • http://repository.unla.ac.id/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/hack-para-tener-robux-infinitos_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/hack-774-roblox_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-tiradas-gratis_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-free-bc--free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-jailbreak-infinite-fire-truck-hack-farm_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-codes-noverber-2021_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hack-unlimited-spins-and-coins-cheats_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-spins-link-quora_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-character-free_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
font_00_sfnt_off000032a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32A9 22352 bytes
SHA-256: 0ceb0eca6ea57e610a965aae27361e60e9a5ace75e30d15f05acf29bca1c3dfc
font_01_sfnt_off00006482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6482 19396 bytes
SHA-256: 446ec0d1d77cd0f3c222768d2f12241757da78b89d10d47a0766243ead919e41

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