Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8f1443d586e2b74…

MALICIOUS

PDF

34.1 KB Created: 2021-06-20 13:11:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 989a9bdb851f879cdac8a6460953fae4 SHA-1: 628dd0994dc2c5dfbd0699f3f5aee1abe0668f49 SHA-256: c8f1443d586e2b7472fce86ab5e6b62bbed050ecaf5e6ad7e4a6fbec16a5dfd8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free Robux and game hacks to entice users to click on embedded links. The primary link directs to known malicious redirector infrastructure, indicating a phishing or scam attempt. While no scripts were extracted, the document's structure and embedded URLs strongly suggest it's designed to lead users 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.co/app/431946152/free-robux-hack-easy-2021-game-hack In PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/coin-drop-master-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/i-need-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/free-coins-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/roblox-hack-menu-pc_GM431946152.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/minecraft-toys-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/how-to-use-a-cheat-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/roblox-dbfs-cheat-engine_GM431946152.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/free-robux-without-downloading-apps_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_off00002d8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D8B 22200 bytes
SHA-256: 6cc0f178b1f5fe4ae843fd715849a22ba813ae359f5e7bffa7d5527bb593d2af
font_01_sfnt_off00005ec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC3 19468 bytes
SHA-256: d973142c0ad6ccc9a945bb38c53c31ac1bde7cdec02b2d1e2aa0ea8570d08a1a

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