Malicious PDF — malware analysis report

Static analysis result for SHA-256 59a9e95ab6c15510…

MALICIOUS

PDF

33.0 KB Created: 2021-07-22 11:15:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b18f4ee475cbe4f3f138226bbf251d01 SHA-1: cb873f3a4e403b652da8a8d3e4e9527624df9d81 SHA-256: 59a9e95ab6c15510fdcc23644dbaa7c1c817ae8684b94336477310056e49c55e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirector lure, pointing to malicious infrastructure at http://netcdn.tw/app/406889139/coin-master-hack-2021-game-hack. The document body also contains this URL and other links to potentially malicious content. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the primary attack vector appears to be a social engineering lure to a malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/406889139/coin-master-hack-2021-game-hack In PDF document text
    • https://torkelson.se/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://torkelson.se/images/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • https://torkelson.se/images/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • https://torkelson.se/images/how-to-get-free-tiktok-fans-without-human-verification_GM835599320.pdfIn PDF document text
    • https://torkelson.se/images/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • https://torkelson.se/images/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • https://torkelson.se/images/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • https://torkelson.se/images/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • https://torkelson.se/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://torkelson.se/images/hacker-minecraft-song_GM479516143.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_off00002bcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BCB 22936 bytes
SHA-256: f5c657db2578ebf3a76c2e0216bc756edc7e64e1cfb82bd8a869a45eaa22ba2c
font_01_sfnt_off00005f34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F34 18116 bytes
SHA-256: 17974cef81917e5ef69542194afa433aff210173cc902887fbc2b56a9328dd03