Malicious PDF — malware analysis report

Static analysis result for SHA-256 161e88100e398677…

MALICIOUS

PDF

41.5 KB Created: 2021-05-15 11:00:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2e56784e31f3d5c79a6f7850ac687b5b SHA-1: e398f6a24eeb6ce9fb888779bdc89a5c60c53dc2 SHA-256: 161e88100e3986774374fbce2c027028df32af5002ce211f4b660d7d8cd597fd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirector infrastructure, specifically promoting "game hacks" and "free generators" to lure victims. The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-hack-apk-app-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly indicate a phishing or social engineering attack, likely serving as a lure for further malicious activity.

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/coin-master-hack-apk-app-game-hack In PDF document text
    • http://baroque1990.com/images/coin-master-free-spins-and-coins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://baroque1990.com/images/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • http://baroque1990.com/images/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://baroque1990.com/images/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://baroque1990.com/images/noob-vs-pro-vs-hacker-vs-god-minecraft_GM479516143.pdfIn PDF document text
    • http://baroque1990.com/images/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://baroque1990.com/images/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://baroque1990.com/images/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://baroque1990.com/images/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://baroque1990.com/images/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • http://baroque1990.com/images/coin-master-free-spin-today-2021_GM406889139.pdfIn PDF document text
    • http://baroque1990.com/images/hack-coin-master-online-without-human-verification_GM406889139.pdfIn PDF document text
    • http://baroque1990.com/images/minecraft-pe-free-download-ios_GM479516143.pdfIn PDF document text
    • http://baroque1990.com/images/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://baroque1990.com/images/2021-no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://baroque1990.com/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://baroque1990.com/images/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://baroque1990.com/images/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://baroque1990.com/images/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://baroque1990.com/images/free-spin-sites-for-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
stream_003_off00004891.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4891 24804 bytes
SHA-256: f32e121e4c149f15959c9ee3190546ed02a4033b832213ad84a754c8bb95edbe
font_01_sfnt_off000080e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80E3 17892 bytes
SHA-256: f939fda97690d6a809d743b342add8ec97984f5e978608423f32dd39679c4d64

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