Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a83bc198f513403…

MALICIOUS

PDF

40.9 KB Created: 2021-05-15 22:20:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4c34761c38057f01dbfe3962c2ffc953 SHA-1: 626c21c72255d707aa27ecabf6e1335b0e5a627a SHA-256: 9a83bc198f51340370a6c0a76f109c2fbe0b6bc72119b9dee7d7f61b24105b02
200 Risk Score

Malware Insights

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

This PDF document employs a lure related to "free generator / game hack" for Coin Master, impersonating Facebook to trick users into clicking a malicious link. The primary link, https://netcdn.xyz/app/406889139/free-spin-link-coin-master-game-hack, is identified as a malicious redirector. The document's structure and embedded URLs suggest it is designed to lead users to phishing sites or download further malicious content, likely exploiting client execution vulnerabilities.

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/free-spin-link-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/free-spin-link-coin-master-game-hack In PDF document text
    • http://only1you.ru/images/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://only1you.ru/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://only1you.ru/images/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://only1you.ru/images/coin-master-hack-fast-org_GM406889139.pdfIn PDF document text
    • http://only1you.ru/images/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • http://only1you.ru/images/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://only1you.ru/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://only1you.ru/images/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://only1you.ru/images/how-to-earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://only1you.ru/images/coin-master-32-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://only1you.ru/images/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://only1you.ru/images/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://only1you.ru/images/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://only1you.ru/images/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://only1you.ru/images/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://only1you.ru/images/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://only1you.ru/images/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://only1you.ru/images/can-you-earn-robux_GM431946152.pdfIn PDF document text
    • http://only1you.ru/images/how-to-hack-coin-master-in-pc_GM406889139.pdfIn PDF document text
    • http://only1you.ru/images/can-you-get-robux-for-free_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_off000045d3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x45D3 24460 bytes
SHA-256: be927432d79989325ea9d6d6caabbb73156ba87eef904cf898c0a385a3ab4b98
font_01_sfnt_off00007ded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DED 18056 bytes
SHA-256: 5e0e5252c5991e876b89620e8fc451db275611f7bed2c8d0b16d9c89ed4fe559

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