Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fb7735b18c06f69…

MALICIOUS

PDF

43.1 KB Created: 2021-05-17 19:36:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 85f6914484e6e201539d4252834ea670 SHA-1: a21bc6d9cdbcebf5ba73c7761c893d6cfd97020f SHA-256: 6fb7735b18c06f69ad776b564364004a1a34889314ab7d4e6d2f0dfb489c500d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with 'game hack' themes. The document body, though partially corrupted, contains a primary URL associated with a 'hack coin master' lure. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest a potential for further malicious activity, such as downloading a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9630

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/hack-coin-master-for-free-game-hack In PDF document text
    • http://linens.kiev.ua/images/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/optifine-mcpe_GM479516143.pdfIn PDF document text
    • http://linens.kiev.ua/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/unlimited-robux_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/how-to-hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/coin-master-mod-apk-hack_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/free-unlimited-coin-master-online-tool_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/coin-master-free-spins-save_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://linens.kiev.ua/images/minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://linens.kiev.ua/images/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/how-to-get-minecraft-for-free-on-mac_GM479516143.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_off0000465f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x465F 24040 bytes
SHA-256: 69d8434b034eb3b68bfdf13b4d36cb6ed37d050f2f325cc2c236561dc9cb9067
font_01_sfnt_off00007d2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D2D 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000086df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86DF 17880 bytes
SHA-256: 257aee740a5ae17e91b93ad4d540c168849f24efe28ef42b55966c96749a0114

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