Malicious PDF — malware analysis report

Static analysis result for SHA-256 f86924220dc6c5c4…

MALICIOUS

PDF

34.6 KB Created: 2021-06-18 02:31:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 64137af2b332ee57c39c094e6bfbacc1 SHA-1: df54c57ef52452cca5a20afd37b98383e4df9708 SHA-256: f86924220dc6c5c4cfe720cc1151e51945f502dc13b5dddcb2b79062e7528f08
160 Risk Score

Malware Insights

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

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising 'free generator / game hack' lures. The ML classifier strongly flagged this PDF as malicious. The embedded URLs and the document's content suggest a social engineering tactic to trick users into visiting potentially harmful sites, likely to download further malware or engage in scams.

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-50-robux-codes-game-hack In PDF document text
    • https://inspiration-modellbau.de/images/roblox-speed-hack-2021-october_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/how-to-get-free-robux-indieun_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/bighead-tshirt-roblox-free_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/roblox-meep-city-how-to-get-free-plus_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/how-do-you-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/blaze-games-free-robux_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/game-toolbox_GM479516143.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/game-test-labs-hack-roblox_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/how-to-hack-roblox-sql_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/roblox-free-play-online-login_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/free-robux-card-codes-live_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/how-can-i-get-every-item-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/roblox-cheatszip_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/coin-master-hack-activegamer_GM406889139.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_off00003095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3095 22240 bytes
SHA-256: ffa971fce485644324d2d1bf8fa9ea2755a37488b5b0d69140d6103441d6238c
font_01_sfnt_off00006227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6227 19012 bytes
SHA-256: b36d1977667ffce50185691b55b062d3b5b35ac84278eae18678c8f608c2415f

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