Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fb5a11f860f8e32…

MALICIOUS

PDF

34.8 KB Created: 2021-07-06 09:46:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5cab8edb485c2cac673fa1775b6aae00 SHA-1: 443fc9f30ff8fe26091f5712b99e7f7ce5874a3b SHA-256: 1fb5a11f860f8e32fac7f66da632dc96abfdc95218a960ca5f60e0764eda9a47
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a game hack redirector lure, pointing to a malicious URL. The document body explicitly mentions 'Get Free Spins For Coin Master' and includes the same malicious URL, reinforcing the phishing attempt. The ML classifier also strongly flagged this PDF as malicious.

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/get-free-spins-for-coin-master-game-hack In PDF document text
    • http://library.itekes-bali.ac.id/repository/april-fools-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-money-limited-tk-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/is-roblox-free-on-pc_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-items-that-are-no-longer-free_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/4life-fun-free-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/odes-for-free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-money-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-do-you-get-admin-by-hacking-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-robux-birthday-glitch_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/hack-diamons-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-hacks-gratis_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-westover-hacks_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_off00003298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3298 22900 bytes
SHA-256: 2feec2139d13af77f0d83bfe2d53cb113e73fc6902ba591970cd378a6f7f59d3
font_01_sfnt_off000065eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65EB 18176 bytes
SHA-256: 76bfdde0d1dbaff2503b84320f04347c0e27e5afe98e240136eaf8f884d81ceb