Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d9cf78118ab445a…

MALICIOUS

PDF

34.0 KB Created: 2021-07-03 17:48:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 82338554e35a52286d0f27bc67975cb5 SHA-1: 5fe99f10a089912a4aec3ac3b799bb0458c52a66 SHA-256: 8d9cf78118ab445ae594491e6358ffdb0aa4bbf5f913eb44043d56cecf317327
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs and a visual download button, strongly suggesting a social engineering attempt to trick the user into downloading malicious content. The ML classifier also flagged this PDF as malicious with high confidence. The document body and extracted URLs focus on game hacks and cheats, indicating a lure for potentially unwanted or malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/479516143/how-to-make-a-minecraft-server-for-free-java-game-hack In PDF document text
    • http://lib.kunci.or.id/repository/free-coin-master-s_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-without-downloads-hypur_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-202119_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/robux-robuxian-awesome-hack_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-robux-with-mods_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/blox-fun-info_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-hack-ohne-telefonnummer_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-hack-software-download_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/robux-free-co_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/hack-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-gift-card-free-codes_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-hack-a-person-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-install-roblox-hacks-booga-booga_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-hack-strucid_GM431946152.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_off000030b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30B7 21976 bytes
SHA-256: eda24655854b69081aa61d4da4e8e6466e2482727b5aef33f50292e64c50d7f7
font_01_sfnt_off0000610c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x610C 18612 bytes
SHA-256: 72eee0763f35a52e2643d2996ff671f9a9f03ad894d8023308a2820f1b3dae8e

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