Malicious PDF — malware analysis report

Static analysis result for SHA-256 78485e810b39c9c0…

MALICIOUS

PDF

44.5 KB Created: 2021-05-16 02:37:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6ce93187068d010a197f4ce090ca02ae SHA-1: af64e04781272bef8d0585603575d2ef679bafef SHA-256: 78485e810b39c9c0fd3848ee69effcfb9655c78ecc2d2d857d6053e74615933b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to known malicious redirectors, disguised as game hacks and generators. The primary lure, 'free-spin-links-coin-master-october-30-2021-game-hack', redirects to 'https://netcdn.xyz/app/406889139/free-spin-links-coin-master-october-30-2021-game-hack', which is flagged as malicious infrastructure. The presence of these links and the ML classifier's high confidence score indicate a phishing or scam attempt designed to lead users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/406889139/free-spin-links-coin-master-october-30-2021-game-hack In PDF document text
    • https://donrazvitie.ru/images/coin-master-hack-tool-pc_GM406889139.pdfIn PDF document text
    • https://donrazvitie.ru/images/roblox-login-hack_GM431946152.pdfIn PDF document text
    • https://donrazvitie.ru/images/coin-master-free-spin-27_GM406889139.pdfIn PDF document text
    • https://donrazvitie.ru/images/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://donrazvitie.ru/images/wurst-18_GM479516143.pdfIn PDF document text
    • https://donrazvitie.ru/images/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • https://donrazvitie.ru/images/roblox-free-item-codes_GM431946152.pdfIn PDF document text
    • https://donrazvitie.ru/images/how-to-get-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://donrazvitie.ru/images/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • https://donrazvitie.ru/images/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • https://donrazvitie.ru/images/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://donrazvitie.ru/images/coin-master-daily-bonus-hack_GM406889139.pdfIn PDF document text
    • https://donrazvitie.ru/images/free-roblox-followers-generator_GM431946152.pdfIn PDF document text
    • https://donrazvitie.ru/images/free-roblox-clothes-girl_GM431946152.pdfIn PDF document text
    • https://donrazvitie.ru/images/how-to-get-free-things-on-roblox_GM431946152.pdfIn PDF document text
    • https://donrazvitie.ru/images/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • https://donrazvitie.ru/images/free-premium-roblox_GM431946152.pdfIn PDF document text
    • https://donrazvitie.ru/images/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://donrazvitie.ru/images/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://donrazvitie.ru/images/how-to-hack-roblox-to-get-free-robux_GM431946152.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_off000047da.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47DA 24972 bytes
SHA-256: 15fe256cfb2ed088dfd8a72cdd1462ef84c09136af934205e936f9e83652ca51
font_01_sfnt_off00008013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8013 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000089c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89C4 18788 bytes
SHA-256: 87b86729e947f81c5a05c0b15119ec86872d8ed29c351927f1fec7084a910a19

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