Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3fd9d814e7610a2…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 08:25:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 088d5e9ebcaf6d21163772bb902e5a87 SHA-1: 9f55403e67477e88987daf4faa430523be9b2fb7 SHA-256: a3fd9d814e7610a26908f587922ffaafac6f357f7fe0bb1725cdc558a1bb6175
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, presenting itself as a guide to obtaining free in-game currency and hacks for popular games. It contains embedded links that direct users to a known malicious redirector infrastructure, likely to serve a second-stage payload or phish for credentials. The ML classifier strongly supports the malicious nature of this PDF.

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/how-to-get-2021-robux-for-free-game-hack In PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/pokemon-go-free-pokeballs-promo-code_GM1094591345.pdfIn PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/how-to-get-free-robux-2021-feb_GM431946152.pdfIn PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/how-to-hack-into-a-roblox-server_GM431946152.pdfIn PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/coin-master-free-online-game_GM406889139.pdfIn PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/roblox-synapses-free-trial_GM431946152.pdfIn PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/free-spins-coin-master-october-17-2021_GM406889139.pdfIn PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/roblox-cash-free_GM431946152.pdfIn PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/coin-master-hack-download_GM406889139.pdfIn PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/afk-hacker-roblox-wds_GM431946152.pdfIn PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/rare-roblox-hacked-face_GM431946152.pdfIn PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/coin-master-cheats-free-spins_GM406889139.pdfIn PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/all-free-catalog-in-roblox_GM431946152.pdfIn PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdfIn PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/roblox-hack-scripts-non-virus_GM431946152.pdfIn PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/robux-pastebin-hack-2021_GM431946152.pdfIn PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/coin-master-hack-online-pc_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_off000030fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30FA 21724 bytes
SHA-256: b43b1edab0e57ebf04f1e181f1376b4e72d4a09d953c3a43c804ef2cf0ca882e
font_01_sfnt_off000060b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B8 19384 bytes
SHA-256: d24c0e100c944da15398cc03dd439e143cfc9f9497013523985f2333f6259ff5

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