Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cea3620a27f5029…

MALICIOUS

PDF

48.0 KB Created: 2021-06-07 08:53:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2a387117d7a311b096716b9035f91062 SHA-1: e89578d08565dcdf3014c638a264f42b1b1ba671 SHA-256: 7cea3620a27f502988822f5ecdef54073eda0b9af814189bdad81edb53fc4c5d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The primary lure URL is https://netcdn.tw/app/431946152/how-to-get-free-robux-on-roblox-android-game-hack, which is associated with known malicious redirectors. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at tricking users into visiting potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/how-to-get-free-robux-on-roblox-android-game-hack In PDF document text
    • http://ig-tauchen.de/images/free-coin-master-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://ig-tauchen.de/images/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://ig-tauchen.de/images/working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://ig-tauchen.de/images/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • http://ig-tauchen.de/images/1x1x1x1-roblox-id_GM431946152.pdfIn PDF document text
    • http://ig-tauchen.de/images/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://ig-tauchen.de/images/free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://ig-tauchen.de/images/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://ig-tauchen.de/images/how-to-hack-coin-master-using-es-file_GM406889139.pdfIn PDF document text
    • http://ig-tauchen.de/images/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://ig-tauchen.de/images/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • http://ig-tauchen.de/images/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • http://ig-tauchen.de/images/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://ig-tauchen.de/images/hack-jailbreak-roblox-2021-krankheit_GM431946152.pdfIn PDF document text
    • http://ig-tauchen.de/images/teach-me-to-hack_GM431946152.pdfIn PDF document text
    • http://ig-tauchen.de/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://ig-tauchen.de/images/free-robux-master_GM431946152.pdfIn PDF document text
    • http://ig-tauchen.de/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://ig-tauchen.de/images/how-to-get-free-snacks-on-coin-master_GM406889139.pdfIn PDF document text
    • http://ig-tauchen.de/images/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005089.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5089 27012 bytes
SHA-256: f1113a4daa225b7e8ca6a2c048c028c64b16b958bb1616b694c57feb7fb9a9e3
font_01_sfnt_off00008e1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E1F 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off000097ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97CE 18652 bytes
SHA-256: 9a1b1be5c98abab59b3db10716de4a2c91b94848ef1afc3c4d58aff556b1d85c

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