Malicious PDF — malware analysis report

Static analysis result for SHA-256 73f8c7603f8850d3…

MALICIOUS

PDF

36.5 KB Created: 2021-06-18 02:51:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5b86cc4ee97ef91d6a5b3651a2b5a458 SHA-1: 4e3bb39e87402ef68eb035e43c7237f78bbf63c9 SHA-256: 73f8c7603f8850d3ccc21a091b4d92120cd0498d1fb62dba46bb3b4d3458747a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as generators for popular games like Roblox and Minecraft. The document body and embedded URLs indicate a lure for free game items, which is a common tactic for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

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/roblox-hacks-compatible-with-vantage-computers-game-hack In PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/minecraft-mod-updater_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-free-spin-and-coin-link-2021-today_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-root-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/hacks-minecraft_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-picture_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/can-lucky-patcher-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/games-that-get-you-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/bl4z3-games-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/cheats-for-city-architect-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/mosttechs-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/tiktok-free-wifi_GM835599320.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-guuudd-info_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_off000034d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34D5 22588 bytes
SHA-256: 132ec85270eafece2008540f5e166f9a6984e3b6e4a1922ddfe72cf0557164ff
font_01_sfnt_off00006759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6759 19956 bytes
SHA-256: b41b53422b95270b5e106f7a7dd3dc48696ee94065ecc9febdc450c4e7fbbe5f

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