Malicious PDF — malware analysis report

Static analysis result for SHA-256 3135d58192c599ba…

MALICIOUS

PDF

44.3 KB Created: 2021-06-11 01:00:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 716d46ee06bece29b39f2b4d5e6d5f21 SHA-1: b62c7c52aa71fe09f32a5148b1d571eec0ecac6c SHA-256: 3135d58192c599baa7b8197e559525ccb4f5f40b95c3c6aefd4b9ee3d3c57d80
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that point to known malicious redirectors, disguised as 'game hacks' or 'free generators'. The document body and embedded URLs suggest a lure for users seeking cheats or in-game currency, which is a common tactic for distributing malware or conducting phishing. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/working-at-a-pizza-place-roblox-hack-script-game-hack In PDF document text
    • http://librarystkippgribl.com//repository/how-to-make-a-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/link-coin-master_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/pokemon-go-free-coins_GM1094591345.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-tricks_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-coin-master-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/roblox-out-of-the-cheater-cage-script_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/daily-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/pubg-uc-kaufen_GM1330123889.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-spins-coin-master-site-wwwquoracom_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://collectrobuxIn 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_004_off0000502f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x502F 24316 bytes
SHA-256: f19162eb124912bb5ce310a841726dedc97b0246b1b84a58fe2d9fdd3172b07d
font_01_sfnt_off00008745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8745 19304 bytes
SHA-256: 2a8e396e0831a5a9bd530284cbec4c81d824ba888894d5851b39edd6a36afc99

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