Malicious PDF — malware analysis report

Static analysis result for SHA-256 13d5b6fbcd65d8db…

MALICIOUS

PDF

44.6 KB Created: 2021-05-12 21:00:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 88e4d5be25b64fff1461e662b5c9d2ac SHA-1: 39cf0bed3517ae9f99a6bfc2f34e96c32aae85f9 SHA-256: 13d5b6fbcd65d8db6f3891974da9631acba92dd6d58bb9db346a8675797baf69
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency and hacks to entice users into clicking malicious links. The primary link identified, https://netcdn.xyz/app/406889139/coin-master-free-spins-game-hack, is associated with known malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or redirection attack designed to lead users to potentially harmful content or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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-game-hack In PDF document text
    • http://origamiperu.com/images/robux-prices_GM431946152.pdfIn PDF document text
    • http://origamiperu.com/images/krnl-download_GM431946152.pdfIn PDF document text
    • http://origamiperu.com/images/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://origamiperu.com/images/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://origamiperu.com/images/legit-coin-master-hack-october-2021_GM406889139.pdfIn PDF document text
    • http://origamiperu.com/images/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://origamiperu.com/images/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://origamiperu.com/images/coin-master-free-shield-link_GM406889139.pdfIn PDF document text
    • http://origamiperu.com/images/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://origamiperu.com/images/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://origamiperu.com/images/oprewards-points-generator_GM431946152.pdfIn PDF document text
    • http://origamiperu.com/images/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://origamiperu.com/images/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://origamiperu.com/images/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://origamiperu.com/images/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://origamiperu.com/images/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://origamiperu.com/images/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://origamiperu.com/images/coin-mster-free_GM406889139.pdfIn PDF document text
    • http://origamiperu.com/images/free-minecraft-skins-pc_GM479516143.pdfIn PDF document text
    • http://origamiperu.com/images/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000482d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x482D 24368 bytes
SHA-256: 1ca73a5dfc0b1bfb265d7a2c7cfaa0e6265461e9461281d9934233a543bc71e6
font_01_sfnt_off00007f30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F30 4084 bytes
SHA-256: df85173feea72dc2f2189124c35b140faf44ef7a36f3496b492965e474480a3b
font_02_sfnt_off00008cee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CEE 17884 bytes
SHA-256: 7b855ef2bb944b5b370c61480927ccad63ff31bdbf820bc1f0da9d35a10f5fb2

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