Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc5364554c14bcec…

MALICIOUS

PDF

41.0 KB Created: 2021-05-15 14:31:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 127ffbf758763ec5f65f6b0c2ff9ff9c SHA-1: 7658c1731623448587effeb3ebf07dca7364a0ab SHA-256: cc5364554c14bcec730f81cb071810c482a81c9537ec1c54165797aa607f3279
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that impersonate the brand Facebook and promise free game hacks or generators. These links redirect to malicious infrastructure, specifically `https://netcdn.xyz/app/406889139/coin-master-apk-game-hack`, which is flagged as a known malicious redirector. The document body and heuristics indicate a credential phishing lure disguised as a game hack offer.

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/coin-master-apk-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/coin-master-apk-game-hack In PDF document text
    • http://sfera-express.ru/images/coin-master-today_GM406889139.pdfIn PDF document text
    • http://sfera-express.ru/images/coins-master-hack_GM406889139.pdfIn PDF document text
    • http://sfera-express.ru/images/minecraft-114-4-download_GM479516143.pdfIn PDF document text
    • http://sfera-express.ru/images/coin-master-hack-cheat-engine_GM406889139.pdfIn PDF document text
    • http://sfera-express.ru/images/coin-master-free-spins-link-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://sfera-express.ru/images/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://sfera-express.ru/images/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/free-online-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://sfera-express.ru/images/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://sfera-express.ru/images/coin-master-games-download-free_GM406889139.pdfIn PDF document text
    • http://sfera-express.ru/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://sfera-express.ru/images/minecraft-pe-hacks-2021_GM479516143.pdfIn PDF document text
    • http://sfera-express.ru/images/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://sfera-express.ru/images/coin-master-hack-app-2021-download_GM406889139.pdfIn PDF document text
    • http://sfera-express.ru/images/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047d2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47D2 24120 bytes
SHA-256: 74cc5ccfadced0be3aa205196bb49c1e07d43cf51a72c1d49447da70f44fa467
font_01_sfnt_off00007ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EBB 17892 bytes
SHA-256: 60a225a48b1b678f90e38b10bd9e6f9d01ffb5102f34dbcee4b716dbf4a04973

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