Malicious PDF — malware analysis report

Static analysis result for SHA-256 16dfa3968a56bdcd…

MALICIOUS

PDF

43.9 KB Created: 2021-05-14 15:02:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d6f2f197f1d1ecc13f6d2f57316ff5f3 SHA-1: 2bb9805b1de9da4416cc1c5e08b055595804f63e SHA-256: 16dfa3968a56bdcd04a3d9182ea131a795b7e2b262d1f24ad99a0fc0e53a2d8e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as game hacks and free spins. The primary malicious URL identified is https://netcdn.xyz/app/406889139/free-spin-and-coin-links-game-hack. The document body, though partially corrupted, contains references to these lures and the malicious URL, indicating a social engineering attempt to drive traffic to malicious sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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 https://netcdn.xyz/app/406889139/free-spin-and-coin-links-game-hack In PDF document text
    • https://pa-pangkalpinang.go.id/images/coin-master-free-rare-cards_GM406889139.pdfIn PDF document text
    • https://pa-pangkalpinang.go.id/images/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://pa-pangkalpinang.go.id/images/coin-master-hack-2021-app_GM406889139.pdfIn PDF document text
    • https://pa-pangkalpinang.go.id/images/how-do-i-get-robux_GM431946152.pdfIn PDF document text
    • https://pa-pangkalpinang.go.id/images/games-like-coin-master_GM406889139.pdfIn PDF document text
    • https://pa-pangkalpinang.go.id/images/coin-master-links-that-don-t-expire_GM406889139.pdfIn PDF document text
    • https://pa-pangkalpinang.go.id/images/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://pa-pangkalpinang.go.id/images/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • https://pa-pangkalpinang.go.id/images/grab-points-login_GM431946152.pdfIn PDF document text
    • https://pa-pangkalpinang.go.id/images/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • https://pa-pangkalpinang.go.id/images/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • https://pa-pangkalpinang.go.id/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://pa-pangkalpinang.go.id/images/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • https://pa-pangkalpinang.go.id/images/free-robux-scam_GM431946152.pdfIn PDF document text
    • https://pa-pangkalpinang.go.id/images/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://pa-pangkalpinang.go.id/images/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • https://pa-pangkalpinang.go.id/images/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • https://pa-pangkalpinang.go.id/images/coin-master-free-coins-spins_GM406889139.pdfIn PDF document text
    • https://pa-pangkalpinang.go.id/images/coins-master-hack_GM406889139.pdfIn PDF document text
    • https://pa-pangkalpinang.go.id/images/real-working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47DC 24552 bytes
SHA-256: 2f6681b962e3a45260ff75a97f075f98a72b9716da6ae53091762f6c7241715f
font_01_sfnt_off00007f59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F59 3204 bytes
SHA-256: 8c2546387700f45186c395d475006178ee984eabbc175bcf1ee6eb58ba8b57aa
font_02_sfnt_off00008a5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A5C 17896 bytes
SHA-256: 9e473fa370b66a6494b15977b9d2a3ea7c01ddc9c3166ab955b90e57f7a3e83c

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