Malicious PDF — malware analysis report

Static analysis result for SHA-256 42e5ebc9fc62afc0…

MALICIOUS

PDF

45.7 KB Created: 2021-05-19 12:12:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c1cdb76d16560d486dc011ce0e969337 SHA-1: c605c02c6045d9517f94dc2d749df24a03f750e6 SHA-256: 42e5ebc9fc62afc0cf2a95a648644fb7627e9372ef6c227f96aae5a36051647e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one identified as a malicious redirector leading to a "coin master free spin group game hack" lure. The presence of a visual download button further supports the deceptive nature of the document. While no scripts were explicitly extracted, the embedded links and the nature of the lure suggest an attempt to direct the user to a malicious website, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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-spin-group-game-hack In PDF document text
    • http://kids-academy.pl/images/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://kids-academy.pl/images/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://kids-academy.pl/images/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://kids-academy.pl/images/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://kids-academy.pl/images/coin-master-spin-link-hack_GM406889139.pdfIn PDF document text
    • http://kids-academy.pl/images/robux-xyz_GM431946152.pdfIn PDF document text
    • http://kids-academy.pl/images/free-gfx-roblox_GM431946152.pdfIn PDF document text
    • http://kids-academy.pl/images/pokemon-go-free-joystick-hack_GM1094591345.pdfIn PDF document text
    • http://kids-academy.pl/images/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://kids-academy.pl/images/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • http://kids-academy.pl/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://kids-academy.pl/images/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://kids-academy.pl/images/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://kids-academy.pl/images/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://kids-academy.pl/images/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://kids-academy.pl/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://kids-academy.pl/images/roblox-old-avatar_GM431946152.pdfIn PDF document text
    • http://kids-academy.pl/images/free-coin-master-spins-link-download_GM406889139.pdfIn PDF document text
    • http://kids-academy.pl/images/coin-master-fan-page-facebook_GM406889139.pdfIn PDF document text
    • http://kids-academy.pl/images/coin-master-promo-code-2021_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
stream_003_off000049d4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49D4 26968 bytes
SHA-256: e6590411ed5beb6ea826ddde0d48d9e13231868b75775f535aaaf9dba718d8e1
font_01_sfnt_off0000871e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x871E 2812 bytes
SHA-256: fc92a80cefddbcc51cb4ecd7284aa73b746cbd66adcf1d96110f0323ec06b51f
font_02_sfnt_off000090bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90BF 18028 bytes
SHA-256: 455ad58cd2f709b2f88bdd169b409c5f407812edddc96e3ba24164b17eb8999f

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