Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbc4e50e744795b7…

MALICIOUS

PDF

45.8 KB Created: 2021-06-03 22:08:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0e1edfb55d593add971bae1dc7dc83cd SHA-1: 91d200b7b6ac93ae4774302576445aa7cb86d520 SHA-256: fbc4e50e744795b7c62cf09446dc34185e463a2fe80eca348e68742b8d33b02c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a known malicious domain, masquerading as a 'free generator' or 'game hack'. The document body and heuristics indicate a lure for users seeking in-game currency or cheats, which is a common social engineering tactic. The primary malicious action observed is the redirection to a potentially harmful site, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/431946152/robux-generator-no-human-verification-2021-game-hack In PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/wwwcoin-master-free-spincom_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-online_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coinmaster-fan-page_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-free-spins-cash_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/gain-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-free-spin-links-december-30-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/pubg-uc-free-online_GM1330123889.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-robux-quiz_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_off000051d5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51D5 25764 bytes
SHA-256: 08a1e543aa80fbcf154bb870b21d6fd834c6cfbfa12d5a369dd800a76c594447
font_01_sfnt_off00008de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE9 19100 bytes
SHA-256: 46a9854d527783ca7b1ede509fad300d1746770329f3da0d8c08611a91ea25c5

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