Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8fb4ef595cf0551…

MALICIOUS

PDF

46.5 KB Created: 2021-06-03 08:35:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4d984da12c34fd86b0e741073ef099d2 SHA-1: 0fe31c9fb97e98e9b8abeb897fedd22d98af49ff SHA-256: f8fb4ef595cf055171b149756fe039e2b317f7615c5d468e2c9a81e6a9900ceb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting game cheats. The primary lure URL is https://netcdn.online/app/406889139/coin-master-cheats-2021-game-hack. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at driving traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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.online/app/406889139/coin-master-cheats-2021-game-hack In PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-pc-game-free-download_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-get-free-faces-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-get-free-outfits-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/get-me-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/extra-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-minecraft-generator_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-spin-link-today-free_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-facebook_GM406889139.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_004_off00004e4a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E4A 25788 bytes
SHA-256: 62da8b44d34f9d639f2619c80b53cb48546ec5f588a90cb9f4d728299e0a65e9
font_01_sfnt_off00008935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8935 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off00009320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9320 18112 bytes
SHA-256: 8fd2be34c5ae6d36bafabdc0d90731bcc2dba590b40522d9b75e2e7b006908cc

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