Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c1111bf215c110a…

MALICIOUS

PDF

41.5 KB Created: 2021-05-15 04:08:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 28e104b0c9e0d06f822fb151d6fc7631 SHA-1: e7d429c10198e3c2685d5e4fcd18746c5c709189 SHA-256: 0c1111bf215c110a9705bbce668927b56473181003bf8639fe5cc4978e40b751
200 Risk Score

Malware Insights

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

The PDF contains multiple links to malicious redirector infrastructure, impersonating Facebook to lure users into clicking on game hack generators. The ML classifier strongly indicated maliciousness, and the embedded URLs are known to lead to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/406889139/village-4-coin-master-game-hack.
  • 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/village-4-coin-master-game-hack In PDF document text
    • http://fishboat.hr/files/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/free-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/get-free-cards-coin-master_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/coin-master-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/free-robux-mobile_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://www.fishboat.hr/files/free-minecraft-java-server_GM479516143.pdfIn PDF document text
    • http://fishboat.hr/files/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/coin-master-hack-online-generator_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/www-free-robux-com_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/coin-master-daily-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/coin-master-game-hack-version-download_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/free-unlimited-coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/coin-master-free-spins-link-ios_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • https://www.fishboat.hr/files/robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/coin-master-hack-2021-ios_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_off00004794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4794 24944 bytes
SHA-256: b6a468289731fec412c2fe9d1e2b9cc321fd13e9db7ab61bedf43468ee4e038d
font_01_sfnt_off0000802f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x802F 18104 bytes
SHA-256: 4663c03cf6a7f36f606ed333490f7780d1655a74df360db77ae51fe1c1360529

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