Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b6b3084a0823ca0…

MALICIOUS

PDF

42.8 KB Created: 2021-05-13 21:32:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: af07ba5e5648660efa59f6575dbb9ce5 SHA-1: e2ed4929a9085ab6b64c07d12502eb2d2d28c098 SHA-256: 5b6b3084a0823ca01902aef081ffe2276913581f3101b018867de37bbd80e546
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as 'game hacks' and 'free generators'. The document body and embedded URLs strongly suggest a phishing or scam attempt, aiming to lure users to potentially malicious sites. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of malicious intent.

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/coin-master-hack-spins-app-game-hack In PDF document text
    • https://www.romedia.gr/images/free-spins-for-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • https://www.romedia.gr/images/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.romedia.gr/images/hack-coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • https://www.romedia.gr/images/hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • https://www.romedia.gr/images/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://www.romedia.gr/images/roblox-online-free_GM431946152.pdfIn PDF document text
    • https://www.romedia.gr/images/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • https://www.romedia.gr/images/free-headless-head-roblox_GM431946152.pdfIn PDF document text
    • https://www.romedia.gr/images/coin-master-apk-free-download_GM406889139.pdfIn PDF document text
    • https://www.romedia.gr/images/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • https://www.romedia.gr/images/coin-master-free-spins-link-31-march-2021_GM406889139.pdfIn PDF document text
    • https://www.romedia.gr/images/free-coin-app_GM406889139.pdfIn PDF document text
    • https://www.romedia.gr/images/fbchampion-com_GM406889139.pdfIn PDF document text
    • https://www.romedia.gr/images/coin-master-com_GM406889139.pdfIn PDF document text
    • https://www.romedia.gr/images/free-magical-chest-coin-master_GM406889139.pdfIn PDF document text
    • https://www.romedia.gr/images/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • https://www.romedia.gr/images/www-free-robux-com_GM431946152.pdfIn PDF document text
    • https://www.romedia.gr/images/free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://www.romedia.gr/images/free-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.romedia.gr/images/minecraft-hacks_GM479516143.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_off0000478a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x478A 27496 bytes
SHA-256: 11f109c14d0830e5180a7afe24b5b2b7acdfa852c9a4304d67bb2ee5a729fe37
font_01_sfnt_off0000860b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x860B 17892 bytes
SHA-256: 116ba2d485dba3cc3c3f0b67c538e954af0badc3125826b285df3e1af5dac94f

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