Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef067af4593b3851…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 15:20:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5e053a1cda11d199a88289d1b0a57151 SHA-1: 6e6aa46dcb93a557f9518ed05c21bf3ca5bfe0c8 SHA-256: ef067af4593b3851e5397f3007a31de0f0ea9113c7b719f0eb522544dc02da69
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'free generators' and 'game hacks' for popular titles. The primary lure URL is http://netcdn.tw/app/431946152/how-to-get-free-roebucks-on-roblox-game-hack. This indicates a social engineering attack aimed at tricking users into visiting potentially harmful sites, likely for further malware delivery or credential harvesting.

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/431946152/how-to-get-free-roebucks-on-roblox-game-hack In PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/i-think-someone-hacked-into-my-roblox-account_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-spin-link-free-download_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/guest-roblox-faced-hacked_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/adopt-me-roblox-hack-money-free-youtube_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-catalog-hacks_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-roblox-with-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-case-clicker-cheats_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/telecharger-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-to-hack-coin-master-using-es-file_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/cheats-hacks-free-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-pokemon-bronze-brick-cheats_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-stuuf-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-dragonball-cheat-engine_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/cheat-pet-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-level-up-hack-on-roblox-phantom-forces_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/haktuts-coin-master-free-spins_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_off00002f3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F3B 22264 bytes
SHA-256: 933d8fd3f2c3d5fd20dd4bf25f6ba9221ac093239f58c2883bd1ce25214c7404
font_01_sfnt_off000060b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B1 19228 bytes
SHA-256: e0defeb3cdfa0b2bd15f1d655f37073a2afc05a1f059c7295c9a06f93db64536

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