Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a89b3ddbb925ce2…

MALICIOUS

PDF

33.6 KB Created: 2021-07-03 11:48:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f6b7690efff75eacd3d81d4831a578ff SHA-1: 424f07c3dfcc2e73384481c1346f4301b2929769 SHA-256: 0a89b3ddbb925ce288704f23a75afcfa1b42d1f642eee657bb301d9be29a9563
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure for free game hacks, directing users to a known malicious redirector. The embedded URLs and the document's structure indicate an attempt to trick users into visiting potentially harmful sites. No scripts were extracted, but the presence of multiple malicious links and the ML classifier's high confidence score strongly suggest a malicious intent to redirect users to further malicious content or downloads.

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/431946152/rbx-free-game-hack In PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/free-draw-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/roblox-hack-week-mirror_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/synapse-x-free-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/make-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/roblox-catalog-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/dimonds-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/roblox-cheat-engine-bypass-june-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/real-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/coin-master-game-hunters-club_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/free-coins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bkkbnkaltim.id/repository/get-free-spins-coin-master-link_GM406889139.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_off00002e96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E96 22256 bytes
SHA-256: 84cb921dc236afbff4865e84b9daa54c6d91f28b6be6ff51eb914912cf483b61
font_01_sfnt_off00006014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6014 18436 bytes
SHA-256: 2d48a67d745eff34c59410c6f401fc0aadb4d4460c05daa6df5995fc624182e2

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