Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab8874e8f7861723…

MALICIOUS

PDF

41.4 KB Created: 2021-05-15 15:00:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2c28cd7e72d3703ce81b3df7d6e4df49 SHA-1: e155bb5f506599311394acad61bac1c48546653e SHA-256: ab8874e8f78617238ad4f01d8848acc19bb8e7d41f5ac32a0f6e793f8baf5f9e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free robux'. The primary malicious URL identified is https://netcdn.xyz/app/406889139/http-appsmob-info-coin-master-hack-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering tactic to drive users to potentially malicious content, likely as a lure for further compromise or scams.

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/http-appsmob-info-coin-master-hack-game-hack In PDF document text
    • https://verstricktundzugenaeht.com/images/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/moon-active-games_GM406889139.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/my-roblox-account-was-hacked_GM431946152.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/coin-master-free-spin-daily-bonus_GM406889139.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/gamehunters-coin-master_GM406889139.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/free-card-link-coin-master_GM406889139.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/coin-master-free-spin-and-coin-link-2021-today_GM406889139.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/coin-master-game-android-free-download_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_off00004870.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4870 24112 bytes
SHA-256: 90f1c4be9abbebb983ad80657093fd295a4118ab6685febac6a9277540626a0b
font_01_sfnt_off00007f41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F41 18308 bytes
SHA-256: 0953d93c21b53bfb1f31fa823a9d7d14e5862c498b99c1777eb7f5d92d60cab0

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