Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b43590bafa8d49a…

MALICIOUS

PDF

35.2 KB Created: 2021-06-23 16:09:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7e56ad3111c0d4e7b2e0917adc6bc764 SHA-1: cb01112de3b466d39d54e0f020a743455be6779e SHA-256: 6b43590bafa8d49a40802f6758182b090cf973ee3192e1d612b155551d6df853
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to websites offering game hacks and in-game currency, such as Robux and Coin Master resources. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent. The presence of external URIs and the document's theme suggest a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

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/how-to-make-acount-for-intriga-roblox-hack-game-hack In PDF document text
    • https://morishita-tc.com.tw/image/data/files/actual-free-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-hack-coin-master-apple_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-link-app_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-get-free-animations-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/where-to-get-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/113-hacked-client_GM479516143.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/robux-fun-hack_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-minecraft-skins-java_GM479516143.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox-unlimited-money-hack-jailbreak_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/btools-hack-roblox-download-2021_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-400-spins-coins-master_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-hack-app-android_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/hack-card-collection-coin-master_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-redvalk-code-roblox-news_GM431946152.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_off0000318a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x318A 22352 bytes
SHA-256: 84dab3694be6b4cfee5566d068f6198681983aa02330380e5a1c7ba48e844a03
font_01_sfnt_off0000634e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x634E 19544 bytes
SHA-256: 266da9b9a34e69d91a282d6cb9e6c5ee589f06a1dacd785e801a05e86c125721

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