Malicious PDF — malware analysis report

Static analysis result for SHA-256 402940c344d5cbf7…

MALICIOUS

PDF

34.1 KB Created: 2021-07-01 10:05:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ffd13c276bab5501eeba677c6919651b SHA-1: a38492425e972cb89e941f2f82eda067c0a3acbf SHA-256: 402940c344d5cbf7da4136efcf9fd0839c72b1d999a2f16f762691faeb69afc7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites offering game hacks and free in-game items, which is a common lure for malicious content. One of the primary links, http://netcdn.co/app/431946152/roblox-urbis-hack-game-hack, is identified as a malicious redirector. The presence of a 'download button' heuristic further supports the intent to trick users into downloading potentially harmful files. No scripts were extracted, but the document's structure and embedded URLs strongly indicate a phishing or malware distribution attempt.

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-urbis-hack-game-hack In PDF document text
    • http://razredna-nastava.net/files/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-roblox-scripting-courses_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-free-tiktok-followers-without-human-verification_GM835599320.pdfIn PDF document text
    • http://razredna-nastava.net/files/can-you-get-in-trouble-hacking-an-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/pokemon-go-free-km_GM1094591345.pdfIn PDF document text
    • http://razredna-nastava.net/files/smart-lodhi-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/counter-blox-roblox-offensive-hacks_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/getrobux-come_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/minecraft-java-edition-free-download-for-android_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/tiktok-free-play-online_GM835599320.pdfIn PDF document text
    • http://razredna-nastava.net/files/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-dragon-ball-final-hack_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/minecraft-free-download-apk-softonic_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-make-a-roblox-ad-for-free_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-free-spins-moonactive_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-free-gift-cards_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_off00002e28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E28 22728 bytes
SHA-256: bea8539fe91b3b64ddfa428f22a037216d50f768654eda2ca870ffffc7baadf5
font_01_sfnt_off000060de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60DE 18776 bytes
SHA-256: 7f28e7556c699a5c74d5e7a55deba2155467826e74959423b7d944a8357ac433

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