Malicious PDF — malware analysis report

Static analysis result for SHA-256 653e6f2803a9d6a5…

MALICIOUS

PDF

42.2 KB Created: 2021-05-14 13:01:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 250b407031dfae845b5d5bae116edfb7 SHA-1: 77c92a2e338fbdc5acff05dce94e01cdba8a6ea9 SHA-256: 653e6f2803a9d6a512e0cac055b5b0bf024251bf074136df5da1daf7fab5a324
200 Risk Score

Malware Insights

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

The PDF document contains multiple links that impersonate the Facebook brand and lure users with "game hack" or "free spins" offers. These links redirect to malicious infrastructure, specifically `https://netcdn.xyz/app/406889139/100-free-spins-for-coin-master-game-hack`, which is associated with known malicious redirectors. The document's structure and embedded links suggest an attempt to trick users into visiting a malicious site, likely for credential harvesting or to download further malware.

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/406889139/100-free-spins-for-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/406889139/100-free-spins-for-coin-master-game-hack In PDF document text
    • http://www.makoto.su/images/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • http://www.makoto.su/images/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • http://www.makoto.su/images/how-many-free-spin-links-is-there-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.makoto.su/images/minecraft-menu_GM479516143.pdfIn PDF document text
    • http://www.makoto.su/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://www.makoto.su/images/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.makoto.su/images/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.makoto.su/images/roblox-person_GM431946152.pdfIn PDF document text
    • http://www.makoto.su/images/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://www.makoto.su/images/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://www.makoto.su/images/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://www.makoto.su/images/how-to-find-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://www.makoto.su/images/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.makoto.su/images/coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://www.makoto.su/images/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.makoto.su/images/roblox-free-items_GM431946152.pdfIn PDF document text
    • http://www.makoto.su/images/daily-free-spins_GM406889139.pdfIn PDF document text
    • http://www.makoto.su/images/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.makoto.su/images/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://www.makoto.su/images/what-is-robux-in-roblox_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
stream_003_off000048aa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48AA 25300 bytes
SHA-256: fc479957abd3505fb67b5b12ec006878ed46853732016ae3b30cf0ebdadcda77
font_01_sfnt_off0000832d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x832D 18164 bytes
SHA-256: 7606299dfa9380825ccbbaa06a4275f303ebe4faec3a3444b55fb030233e8f05

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