Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1b30dbf3c6dae68…

MALICIOUS

PDF

34.0 KB Created: 2021-07-19 09:16:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7446a29c42129454d6fb0d2ddaa627fe SHA-1: d8ba8942ffc806c4dbdd453c8621782f685da4fc SHA-256: e1b30dbf3c6dae68988c6bcb45c63e8205e1548eb1878063b54022c69b3969ff
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting 'free generators' and 'game hacks' for popular games and apps. The document body and embedded links strongly suggest a lure to trick users into visiting these sites, likely for further malware delivery or credential harvesting. No scripts were extracted, but the primary malicious activity is the redirection to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://netcdn.tw/app/835599320/free-tiktok-followers-app-game-hack In PDF document text
    • http://cosver.eu/images/robux-free-c_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://cosver.eu/images/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • http://cosver.eu/images/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://cosver.eu/images/coin-master-hack-without-verification_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
font_00_sfnt_off00003174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3174 22640 bytes
SHA-256: 0d55a156cf7256b2cadef0ab5a95e53225d36a88e3fdb6b6530bfe4efb0f3cb1
font_01_sfnt_off0000643e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x643E 17872 bytes
SHA-256: 34129f1c56e014fb2604607ed740d581eed4f4cd55f156cb19b3173e06165e4c

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