Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f58b6a0c5adda00…

MALICIOUS

PDF

44.9 KB Created: 2021-05-13 12:38:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cf01940d0b934ec8f9c4cddb7374dbc1 SHA-1: acd92b159103d530a304c5fd804404ee01ef1e21 SHA-256: 1f58b6a0c5adda003b25d410b63b4bc3754198bcf3b6cbfd810d1879b6625a4e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent link disguised as a download for a 'Coin Master Hack Mod Apk Free Download'. This link redirects to malicious infrastructure known for hosting scams and potentially unwanted applications. The presence of multiple embedded URLs and the ML classifier's high confidence score indicate a deliberate attempt to deceive users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/coin-master-hack-mod-apk-free-download-game-hack In PDF document text
    • http://serviio.org/images/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://serviio.org/images/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • http://serviio.org/images/minecraft-jar-free_GM479516143.pdfIn PDF document text
    • http://serviio.org/images/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://serviio.org/images/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://serviio.org/images/coin-master-instagram-free-spins_GM406889139.pdfIn PDF document text
    • http://serviio.org/images/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://serviio.org/images/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • http://serviio.org/images/coin-master-free-spins-iphone-2021_GM406889139.pdfIn PDF document text
    • http://serviio.org/images/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://serviio.org/images/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://serviio.org/images/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://serviio.org/images/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://serviio.org/images/coin-master-hack-apk-link_GM406889139.pdfIn PDF document text
    • http://serviio.org/images/coin-master-free-food_GM406889139.pdfIn PDF document text
    • http://serviio.org/images/how-to-get-free-skins-in-roblox_GM431946152.pdfIn PDF document text
    • http://serviio.org/images/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://serviio.org/images/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://serviio.org/images/get-more-robux_GM431946152.pdfIn PDF document text
    • http://serviio.org/images/free-spins-coin-master-hack-2021_GM406889139.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_off000047a1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47A1 25280 bytes
SHA-256: ea35234e6392ecada738e841baf7e09219d51f95b8223c146b2c559e88ecf52b
font_01_sfnt_off0000824a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x824A 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008bfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BFB 18636 bytes
SHA-256: f35a088bb389889b7dbdb2955ea981e64c4ac43926c2f49735e1909520ee0b52

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