Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8cdc4c4bad64e90…

MALICIOUS

PDF

34.6 KB Created: 2021-07-03 22:03:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 260ff016b076a1914bbd92b5378f6384 SHA-1: 8974076ff8587e17ea8b39ab322fbb69dfa29e91 SHA-256: d8cdc4c4bad64e901cbe935f573cb5fa1c24e816646b5b035eeba42bf1fc79cd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks or cheats. The primary lure URL is http://netcdn.tw/app/479516143/how-to-downgrade-minecraft-pe-game-hack, which is flagged as a malicious redirector. The document body and embedded URLs reinforce this lure, aiming to trick users into downloading potentially harmful content.

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/479516143/how-to-downgrade-minecraft-pe-game-hack In PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-robux-giver-online_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-thing-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/minecraft-free-download-laptop_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/acop-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-coins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/roblox-tony-stark-shirt-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/roblox-dr-benx-hacken_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/static-moonactive-net-rewards_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/cool-looking-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/roblox-hacked-client-esp_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-hack-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-hack-ios-without-verification_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-heaven-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/how-to-hack-your-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/how-to-hack-someones-roblox-account_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_off00003162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3162 22620 bytes
SHA-256: 2400f91be13d357350cb1ff13a35c59a5811fc058edae0c61370df81289dd057
font_01_sfnt_off00006372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6372 18656 bytes
SHA-256: f671632c41bdcd8896512b89e0179723263a2bce0274879a7730ace5e1a9329c

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