Malicious PDF — malware analysis report

Static analysis result for SHA-256 c54b9639a1d9d5ae…

MALICIOUS

PDF

43.3 KB Created: 2021-05-11 05:03:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6fa41e807e732775d943ec1c5a332126 SHA-1: 5a1676bb3ef57d1c07d3d07acda8f88aacd59c11 SHA-256: c54b9639a1d9d5aeedfc2dc6db137d22efe161f897beab8ca661618898949443
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and known malicious infrastructure, disguised as a lure for free game currency or hacks. The document body and embedded URLs strongly suggest a phishing or scam attempt, likely leading to further malware download or credential harvesting. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/431946152/how-to-win-free-robux-game-hack In PDF document text
    • http://dshikr.ru/images/lots-of-robux_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://dshikr.ru/images/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/strucid-aimbot_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/free-spins-coin-master-links-app_GM406889139.pdfIn PDF document text
    • http://dshikr.ru/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/coin-master-free-spin-download_GM406889139.pdfIn PDF document text
    • http://dshikr.ru/images/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • http://dshikr.ru/images/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://dshikr.ru/images/coin-master-hacks-no-human-verification_GM406889139.pdfIn PDF document text
    • http://dshikr.ru/images/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • http://dshikr.ru/images/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/roblox-rewards-site_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/coin-master-free-download-pc_GM406889139.pdfIn PDF document text
    • http://dshikr.ru/images/coin-master-hack-blogspot_GM406889139.pdfIn PDF document text
    • http://dshikr.ru/images/coin-master-free-spins-link-2021-ios_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_off00004850.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4850 26664 bytes
SHA-256: 11625582887e2cbaaae13f1ef79c28450bd120b68e1ffbd85f995f73f49a9a46
font_01_sfnt_off0000862d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x862D 18496 bytes
SHA-256: e7fadbffdbea7672d80b62dbce00c4cb5a3018b55a4b8226d615899545ab846e

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