Malicious PDF — malware analysis report

Static analysis result for SHA-256 aca67beb30d2b1cd…

MALICIOUS

PDF

44.0 KB Created: 2021-06-03 10:15:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 420ca7b3a9ca2ea415a13773ea3e3f02 SHA-1: 92fa907f07f993600c7b94b9cd094a745e9b0a26 SHA-256: aca67beb30d2b1cd4683c650f9512f44ca374adc50945c9617ac244ae1e927ee
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to external websites, including a known malicious redirector at `https://netcdn.online/app/406889139/coin-master-rare-cards-hack-game-hack`. The document body and embedded links suggest a lure for game-related cheats and currency, a common tactic for distributing malware or phishing for credentials. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of malicious intent.

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.online/app/406889139/coin-master-rare-cards-hack-game-hack In PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-coins-coin-master-today_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/what-is-a-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-robux-script_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/facebook-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/what-is-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/coin-master-free-spins-2021-app_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/freespinandcoin_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/mc-update_GM479516143.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/pokemon-go-free-daily-box_GM1094591345.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/coin-master-hack-facebook_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-robux-ad_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
stream_004_off0000522f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x522F 24672 bytes
SHA-256: e7e8d50b39d38cc5c34397d29432ec8c2b1ca031bb7dce8debe5df3e37f60d96
font_01_sfnt_off00008a86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A86 17888 bytes
SHA-256: 3bcd7f88e9aff6a3f00dfa05e6d37dfcb1a17a5992fabfc54377b1f82d15f42c

Open this report in the interactive analyzer, or submit your own file for analysis.