Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c0f062f47d0656d…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 18:32:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fa56bdcf3cc1fc456cf861c118a8bd67 SHA-1: e9c914b5b237933dfe4374f29ae6cdb57afb2046 SHA-256: 1c0f062f47d0656db84100b26dea5577314a00643d8232d6c2c1749aae9c8156
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically http://netcdn.tw/app/406889139/daily-free-spins-coin-master-game-hack, which is disguised as a 'free generator / game hack'. The document body and embedded URLs reinforce this lure by mentioning free spins, game hacks, and robux. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a phishing or scam attempt designed to lead users to malicious sites.

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/406889139/daily-free-spins-coin-master-game-hack In PDF document text
    • http://library.itekes-bali.ac.id/repository/free-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-red-glowing-eyes-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-red-free-pants_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/click-to-teleport-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/cheat-roblox-kick_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-get-free-gear-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/command-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/hack-to-get-clothes-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-car-crushers-2-hack_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-hacks-iphone_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-do-you-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/in-roblox-field-of-battle-how-do-you-hack_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-free-robux-event_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-spins-and-coins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-roblox-accounts-2021-may_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_002_off00003269.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3269 22500 bytes
SHA-256: 1852203d06da09180bee27d1630b9682160fcdc73e1119468a062aaf17246c4e
font_01_sfnt_off000064ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64AD 18596 bytes
SHA-256: e1561e5ad11d6fa371b43628261e275aedbbfff84e2cc2a1b863fefe4a2dbfc2