Malicious PDF — malware analysis report

Static analysis result for SHA-256 d78c2ca5631cd417…

MALICIOUS

PDF

35.1 KB Created: 2021-06-27 05:24:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 83c37e6ac5667969e78d4dbc76a0684c SHA-1: 2c9cf5666c45795e4afc6ad01576cb1a67ae1765 SHA-256: d78c2ca5631cd417dee3f1c87b91457c4f737e757b51171cd4b3ea7ea5b0e4d1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to external websites, including a known malicious redirector at http://netcdn.co/app/431946152/how-to-hack-roblox-wikihow-game-hack. The document body and embedded links are designed to lure users with promises of game hacks and free currency, a common social engineering tactic. The presence of multiple redirector links and the ML classifier's high confidence score indicate a malicious intent to lead users to potentially harmful content or further malware delivery.

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-to-hack-roblox-wikihow-game-hack In PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/roblox-secret-cheat-codes-for-music-its-raining-tacos_GM431946152.pdfIn PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/hack-robux-pastebin-2021_GM431946152.pdfIn PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/village-4-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/coin-master-ad_GM406889139.pdfIn PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/increible-hack-robux-pastebincom-80b1sjzp-davidtoasa_GM431946152.pdfIn PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/robux-2021_GM431946152.pdfIn PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/robux-hack_GM431946152.pdfIn PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/free-roblox-groups_GM431946152.pdfIn PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/how-to-get-free-robux-codes_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_off00003055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3055 22728 bytes
SHA-256: 2c2dc0f55eba7be302e88eef3e31f6353af581217c01159b347368570a74fa6e
font_01_sfnt_off0000637a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x637A 19304 bytes
SHA-256: fa747d40e40dce7e7dfc0963f85c6a1e83a48d3180449f40d1364e4656a32c4f

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