Malicious PDF — malware analysis report

Static analysis result for SHA-256 6df59a4bf7aae05f…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 00:31:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b8ff93a7624d5b1217145620aac5deb2 SHA-1: f9d09ce9e8d351bf52815431f8d8b1fa53936630 SHA-256: 6df59a4bf7aae05fbd149656c1a9eabeb2bec9f36caf651ed6093597fc3a619f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and text lures related to 'free Robux' and game hacks, directing users to the URL http://netcdn.tw/app/431946152/free-robux-videos-game-hack. This URL is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document's purpose appears to be social engineering to drive traffic 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.tw/app/431946152/free-robux-videos-game-hack In PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/roblox-hack-no-crash_GM431946152.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/what-is-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/hack-the-streets-roblox_GM431946152.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/free-codes-assassin-roblox_GM431946152.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/roblox-free-items-promo-codes_GM431946152.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/free-headphone-roblox_GM431946152.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/roblox-jailbreak-noclip-hack-2021-unpatched-download-link_GM431946152.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/hacks-para-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/fps-roblox-free_GM431946152.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/roblox-how-to-change-username-for-free_GM431946152.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/roblox-best-hack-clients-virus-free_GM431946152.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/coin-master-facebook-free-spins_GM406889139.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/how-to-get-free-t-shirt-in-roblox_GM431946152.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/coin-master-hack-8-ball-pool_GM406889139.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/how-to-cheat-on-da-hood-roblox_GM431946152.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/free-robux-earn_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_off00002ff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF1 22808 bytes
SHA-256: 03237a6a3aca2046e24816feefa6d75746708330a43afe0ac7c48998d107e0e5
font_01_sfnt_off0000632f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632F 19144 bytes
SHA-256: 048610b92919bfdce60157d4731565e56a55670f765c015c635ee9317ce402b7

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