Malicious PDF — malware analysis report

Static analysis result for SHA-256 e82ceda66184c3f6…

MALICIOUS

PDF

44.0 KB Created: 2021-05-13 06:37:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c8bf6b50c9cdc893142ff77eede2a1a4 SHA-1: 0f6e219e5feef85c7b370dedab99e1d0b707353f SHA-256: e82ceda66184c3f67b32d647ad7d1910ed6a38103ffcbff00bb4a4fbfa496384
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically disguised as 'game hacks' and 'free generators' for popular games like Roblox and Coin Master. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lures suggest an intent to redirect users to potentially malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 https://netcdn.xyz/app/431946152/roblox-earn-robux-game-hack In PDF document text
    • http://rzt.com.ua/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://rzt.com.ua/images/get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://rzt.com.ua/images/body-roblox_GM431946152.pdfIn PDF document text
    • http://rzt.com.ua/images/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://rzt.com.ua/images/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://rzt.com.ua/images/how-to-hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • http://rzt.com.ua/images/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://rzt.com.ua/images/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://rzt.com.ua/images/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://rzt.com.ua/images/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://rzt.com.ua/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://rzt.com.ua/images/coin-master-heaven-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://rzt.com.ua/images/coin-master-gold-cards-free-2021_GM406889139.pdfIn PDF document text
    • http://rzt.com.ua/images/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • http://rzt.com.ua/images/50-000-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000444e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x444E 25240 bytes
SHA-256: ba184b7b2e1f94c93b460caf8a49c4b615fe54a78a7f0091321ff73615118ee8
font_01_sfnt_off00007f59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F59 3112 bytes
SHA-256: 471f662098e83c5562504503f5e7603b336ca0957605358090bb98e15c7aed80
font_02_sfnt_off00008a12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A12 18152 bytes
SHA-256: ac560818c0950b36a4d7f23f452e83199291727370614d0236bf7521a0e82fc3

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