Malicious PDF — malware analysis report

Static analysis result for SHA-256 bda8c621908c7666…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 11:43:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6e86bd920e94551cb9731a5f99050396 SHA-1: cc66da049f0c5ebcc433066b2ac4edfb60b2ed31 SHA-256: bda8c621908c76665773d7e897e65b05b1fde7f0b5c4461b39c96a3a173d16fe
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded URLs that lead to known malicious redirectors, disguised as game hacks and free currency generators. The document body and heuristics indicate a lure to trick users into clicking these links, which likely serve as a first stage for further malicious activity such as credential harvesting or malware delivery. No scripts were extracted, but the presence of malicious redirectors and the lure content strongly suggest a phishing or malware distribution attempt.

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/coin-master-free-spins-link-facebook-page-game-hack In PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/can-you-get-bloxburg-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/free-robux-pointsprizes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/roblox-hacks-for-mac_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/fun-flex-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/coin-master-game-free-spin_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/hack-para-jailbreak-roblox-2021-diciembre_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/roblox-download-free-microsoft_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/hack-coin-master-apk-31_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/minecraft-app-free-download_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/roblox-hack-exploit-spvx-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/roblox-free-clothes-website_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/coin-master-free-spins-link-2021-april_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/roblox-robux-generator-online-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/mm2-roblox-cheat-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/youtube-free-fire-tik-tok_GM835599320.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_off000031c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31C9 22904 bytes
SHA-256: 352694e2964d6791102cbb64ed45c2c997155f69269f3e834a71a4b03b0b8759
font_01_sfnt_off00006539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6539 18656 bytes
SHA-256: 89eea19505d51e592afe5e27b7406d8b413666f07e3cf0068fd223b3681a9c64

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