Malicious PDF — malware analysis report

Static analysis result for SHA-256 fda88cf45c4c162c…

MALICIOUS

PDF

43.0 KB Created: 2021-05-11 16:38:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 503f7950b8c9686a29795713a447c302 SHA-1: 6c1dc8b3e0fbb186304c8fb10a523194c90cb20b SHA-256: fda88cf45c4c162c78a90d25ac179d1db26e93c7f25c8e181cc70f676fc9f274
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting "game hacks" and "free spins" for games like Coin Master and Robux. The primary lure URL is https://netcdn.xyz/app/406889139/coin-master-hack-unlimited-spins-apk-download-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering tactic to drive users to potentially malicious sites, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coin-master-hack-unlimited-spins-apk-download-game-hack In PDF document text
    • http://library.asih-husada.ac.id/repository/coinmasterfreespinlink_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coinmaster-com_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-cards_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-free-spins--spins_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/fb-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/100-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-pet-food-coin-master_GM406889139.pdfIn PDF document text
    • https://coinmasterspinandcoin.comIn 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_003_off000049d6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49D6 25200 bytes
SHA-256: df4827b3bb7ad535be8dd4fa4401f03e6b5105402b83633113129c04c21f50de
font_01_sfnt_off000083b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83B6 18916 bytes
SHA-256: 36b5946d0fa01df03061b9872aea65f63cba93bccd0378a8f0b0329212d0019c

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