Malicious PDF — malware analysis report

Static analysis result for SHA-256 eac81320a5a553ae…

MALICIOUS

PDF

48.6 KB Created: 2021-05-12 04:10:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f51e9b71d08f683887313c98bf95b108 SHA-1: 48b842215374fd83768e2ee74f27255706102b80 SHA-256: eac81320a5a553ae58f94a40bef2e6bd289aa9377731d0817e5dbd400ef3bf18
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'game hacks' and 'free coins' to lure users. The primary redirector identified is https://netcdn.xyz/app/406889139/coin-master-free-coins-link-2021-deutsch-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or redirection attack, likely intended to lead users to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8642

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-free-coins-link-2021-deutsch-game-hack In PDF document text
    • https://itv-grabungen.de/images/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-free-spins-and-coins-link-haktuts_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/get-free-robux-info_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-rewards-coin-master_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-minecraft-java-edition-account_GM479516143.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/get-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/hack-xp-net-coin-master_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • https://itv-grabungen.de/images/coinmaster-spins_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-game-free_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-robux-now_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-free-spins-bit-ly_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-hacks-no-surveys_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b46.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B46 24120 bytes
SHA-256: e8549f71f0469f379352c3447e1211b03602dc8956ce486b8f61bf377eb69f7a
font_01_sfnt_off0000825e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x825E 4028 bytes
SHA-256: a17c2a746d49ac23b23e38a371e32fddecfcd91b10cf42ff6155bff6b8a07e91
font_02_sfnt_off00008fff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FFF 2788 bytes
SHA-256: 6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530
font_03_sfnt_off000099ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99EF 18756 bytes
SHA-256: cee569ad26c6995f0462545108d280bf76b2c9dfe620e2643f0a7a8ec4db527a

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