Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bd1260b69e8ff61…

MALICIOUS

PDF

42.1 KB Created: 2021-05-16 01:48:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 21fe1fdf4e8bde854032044001cbc6e1 SHA-1: d225dff917b09b87995372d2d4cba490fd68b78c SHA-256: 1bd1260b69e8ff6177f5f1aecb4826d9fffef602d1ba18c6715b7f7ddbefe3f2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, specifically advertising 'game hacks' and 'free spins' to lure users. The document body, though partially corrupted, contains similar lures and references to the malicious URL. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/coin-master-free-spins-link-today-instagram-game-hack In PDF document text
    • http://smpn1sda.sch.id/slims/repository/wurst-client_GM479516143.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coin-blogspot_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/how-to-hack-coin-master-game-2021_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-roblox-card-codes_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coin-master-spins_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coin-master-100-free-spins-link_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/microsoft-rewards-robux_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/roblox-points_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/robux-2021_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coin-master-hacking-news_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-roblox-printables_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-game-packs-for-coin-master_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/50-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/links-for-coin-master-free-spins_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
stream_003_off00004782.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4782 24796 bytes
SHA-256: 0abf2c8ac7cebdbb01acac3da271d9cf8694e239a8cab0aa72304f91a1716142
font_01_sfnt_off00008004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8004 18960 bytes
SHA-256: c3cae131f36bdfe9c813bd150295f39ca0ceeabf3546a2df254cc03f93d9c6e3

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