Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a1aa77f227cb345…

MALICIOUS

PDF

41.9 KB Created: 2021-05-15 12:22:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a64750b3e65c4bc9e800efe4eb450c86 SHA-1: f9523cbad87c413ef5858d9f296639b22e774b9a SHA-256: 5a1aa77f227cb3453d5d3727a9b2d5c4c9f7bb4d844209c520884ec874a2e1fd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a redirector infrastructure that is known to host malicious content, specifically lures for game hacks and free currency. The document body and embedded URLs suggest a phishing or scam attempt to trick users into visiting these malicious sites. No scripts were extracted, but the presence of multiple 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/how-to-get-free-spins-on-coin-master-hack-game-hack In PDF document text
    • http://lichtdrukkerijwijchen.nl/images/haktuts-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://lichtdrukkerijwijchen.nl/images/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://lichtdrukkerijwijchen.nl/images/game-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lichtdrukkerijwijchen.nl/images/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://lichtdrukkerijwijchen.nl/images/www-roblox-robux_GM431946152.pdfIn PDF document text
    • http://lichtdrukkerijwijchen.nl/images/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://lichtdrukkerijwijchen.nl/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://lichtdrukkerijwijchen.nl/images/robux-for-surveys_GM431946152.pdfIn PDF document text
    • http://lichtdrukkerijwijchen.nl/images/coin-master-hack-version-apk-download_GM406889139.pdfIn PDF document text
    • http://lichtdrukkerijwijchen.nl/images/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://lichtdrukkerijwijchen.nl/images/coin-master-hack-app-ios-download_GM406889139.pdfIn PDF document text
    • http://lichtdrukkerijwijchen.nl/images/free-robux-com_GM431946152.pdfIn PDF document text
    • http://lichtdrukkerijwijchen.nl/images/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • http://lichtdrukkerijwijchen.nl/images/coin-master-card-collection-link_GM406889139.pdfIn PDF document text
    • http://lichtdrukkerijwijchen.nl/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lichtdrukkerijwijchen.nl/images/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://lichtdrukkerijwijchen.nl/images/coin-master-free-daily-rewards_GM406889139.pdfIn PDF document text
    • http://lichtdrukkerijwijchen.nl/images/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://lichtdrukkerijwijchen.nl/images/regal-world-coin-master_GM406889139.pdfIn PDF document text
    • http://lichtdrukkerijwijchen.nl/images/coin-master-free-spin-ml_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
stream_003_off00004863.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4863 25688 bytes
SHA-256: a64e081bfbe10b6655d392564826d06c86e127f5fe4581cfd834f87f4a01f0e5
font_01_sfnt_off000081af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81AF 18220 bytes
SHA-256: b9590c860e10d8f9c020beecb5b6ba48e280dd1fb7308b582b518c7b33ada2d7

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