Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a4c5e9da2e48e9e…

MALICIOUS

PDF

32.6 KB Created: 2021-06-30 02:09:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5557bb8e3d1fd90504e556328041e8f9 SHA-1: 6a52bcc6b3a9a8ae51c15668eda7d797a71a6541 SHA-256: 5a4c5e9da2e48e9e3a6bc4fa2291418f5c6a2e99988837cd76e72c50a1a434f9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free currency' lures. The primary redirector URL is http://netcdn.co/app/431946152/hack-roblox-ban-accoints-game-hack, which is flagged as malicious. The document body and heuristics confirm the intent to trick users into clicking these links, likely leading to further malware downloads or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/hack-roblox-ban-accoints-game-hack In PDF document text
    • http://mbbs.hr/files/android-coin-master-3433-apk-hack_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/ios-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-hack-2021-apk-download_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-legally-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-hacksco_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-get-free-tiktok-followers-without-human-verification_GM835599320.pdfIn PDF document text
    • http://mbbs.hr/files/free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-dominus-roblox_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/rbx-hut_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-get-robux-clothes-for-free_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/coinmaster-spin-ml-free_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-get-free-coins-and-spins-on-coin-master_GM406889139.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
font_00_sfnt_off00002c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C0B 21280 bytes
SHA-256: c499c412b044bb4879ba2dcdfc2a098726dead11be2a7a253ba092a51ddaf3af
font_01_sfnt_off00005a83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A83 18880 bytes
SHA-256: a5686df6d0fc82a698366033bf38f7fa4409f48881d66e111e4c918e372c4259

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