Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d6f1f8d37e9492c…

MALICIOUS

PDF

45.6 KB Created: 2021-05-18 23:55:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b392d7405406889c794508558c7f8e63 SHA-1: 1d86e9b1fcd8fedff944267822d119d9b49cfeb9 SHA-256: 3d6f1f8d37e9492cb572b8785ddbc3c9a6a61510af757a144c96cfc4d02d107f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency or hacks to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which in turn serves other malicious PDFs hosted on 'gruporamos.do'. The document body and embedded URLs strongly indicate a social engineering tactic to drive users to download or access further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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-pc-game-hack In PDF document text
    • http://gruporamos.do/images/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/how-to-get-minecraft-for-free-2021_GM479516143.pdfIn PDF document text
    • http://gruporamos.do/images/minecraft-app-free-download_GM479516143.pdfIn PDF document text
    • http://gruporamos.do/images/free-coin-master-spins-2021-link_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/how-to-make-a-private-server-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/minecraft-windows-10-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://gruporamos.do/images/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/50-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/how-to-hack-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • http://gruporamos.do/images/game-toolbox_GM479516143.pdfIn PDF document text
    • http://gruporamos.do/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/clients-minecraft_GM479516143.pdfIn PDF document text
    • http://gruporamos.do/images/game-hunters-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/coin-master-free-coins-link-facebook_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004911.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4911 26728 bytes
SHA-256: bbd06b44b9664bafa7f19ed57ccbd1aba870e816663ae77677604db9492880c6
font_01_sfnt_off00008741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8741 2868 bytes
SHA-256: d2d857e2ddc1082c7667b23f2135a5c0ba26a2ff8b42c86c89c8e0b09aece855
font_02_sfnt_off0000912c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x912C 17868 bytes
SHA-256: d0fcbd0a52ba681250a66b5fd254fe701dbce3b80d82eca2366e1a97fce9e3f6

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