Malicious PDF — malware analysis report

Static analysis result for SHA-256 38f415ca680b1b88…

MALICIOUS

PDF

34.3 KB Created: 2021-07-01 21:43:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c3ec5fd78fa96cfbe08eeff749560e84 SHA-1: ebde04e7e41d9fa3f80d183f40bf96086960e21d SHA-256: 38f415ca680b1b886ca27cbbb556c6e814d1c122017f813a4453ace4d197e2a7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and free in-game currency. The primary redirector URL is http://netcdn.co/app/431946152/youtube-how-to-hack-acounts-on-roblox-game-hack, which likely leads to further malicious content or phishing pages. No scripts were extracted, but the document's structure and embedded URLs strongly indicate a 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/youtube-how-to-hack-acounts-on-roblox-game-hack In PDF document text
    • http://mtsn-baranti.com/perpus/repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/get-free-clothes-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-get-25-robux-for-free_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/rbx-sites_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-mobile-24-com-roblox_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/roblox-xbox-one-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-coin-master-stuff_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/feb-23-2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/hack-for-roblox-jailbreak-downloads_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-promo-codes-for-roblox-robux_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-get-free-mods-in-minecraft_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/all-apocalypse-rising-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/roblox-royalty-free-music_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_off00002fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FBB 22000 bytes
SHA-256: 211dd99a3fa20fb8247e9d4f3524caf8d7227314b6fc62adfab18cc9e8ff2807
font_01_sfnt_off00006022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6022 19228 bytes
SHA-256: 5ed8939430c33917f58730953f044e7173bd2d083edf5896774d3610615d76a3

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