Malicious PDF — malware analysis report

Static analysis result for SHA-256 86520ac8f64aa07f…

MALICIOUS

PDF

41.8 KB Created: 2021-05-14 09:00:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 679f4d5f84d5c6c491bfd9ab9757f0bb SHA-1: 28f150f090d079ae1b77f4b2e3e338a9f5f9f321 SHA-256: 86520ac8f64aa07f7242c5967fb18fb54cf5e62c7d89bb5c9333e8ac44db1f4f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and game hack lures, indicating a social engineering attempt to drive traffic to potentially harmful sites. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lures suggest a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/free-spin-link-for-coin-master-game-game-hack In PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/coin-master-levels_GM406889139.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/coin-master-34-4-hack_GM406889139.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/coin-master-34-4-hack-download_GM406889139.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/download-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/cute-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/coin-master-free-spins-cheat-codes_GM406889139.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/game-hunters-coin-master_GM406889139.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/free-spin-and-coin-links_GM406889139.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_off000047cb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47CB 25740 bytes
SHA-256: 071839ac6ff56e3f0aca545cd7bc7ed25f576251204f169fbc72c3283b085c74
font_01_sfnt_off00008126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8126 18316 bytes
SHA-256: 4ad106dc66915d7a7c54c506e35e2e74cb7406920644c521a55874c4c44ea7c2

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