Malicious PDF — malware analysis report

Static analysis result for SHA-256 38e85bf386ddb3b8…

MALICIOUS

PDF

49.6 KB Created: 2021-05-20 14:56:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4d405f7541e63a2656a30bc73b89d46a SHA-1: 72131a8340e5356abea53e6ea9c25f8bf18f8af9 SHA-256: 38e85bf386ddb3b8086f868066040c807dac7d6df6b90c43e34239169bd35356
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure related to free game spins and hacks to entice users. It contains multiple links to malicious redirectors and potentially unwanted content, as indicated by the PDF_GAME_HACK_REDIRECT_LURE and PDF_MALICIOUS_REDIRECTOR_LINK heuristics. The document body also contains embedded URLs that lead to these malicious sites, suggesting an attempt to drive traffic to potentially harmful content or further phishing attempts.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3298

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/where-can-i-get-free-spins-for-coin-master-game-hack In PDF document text
    • http://calavera.be/images/roblox-free-clothes-generator_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/coin-master-cheats-for-free-spins_GM406889139.pdfIn PDF document text
    • http://calavera.be/images/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/coin-master-free-spins-link-ios_GM406889139.pdfIn PDF document text
    • http://calavera.be/images/today-coin-master-spin-free_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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003577.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3577 26828 bytes
SHA-256: 80f85504b1a2ed6f7b4cc3ba86f5a6f740c7222345f35a4cc61c47248abb45e0
font_01_sfnt_off00007419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7419 3088 bytes
SHA-256: e7854aff7cbc8fbdeb85d2b3d6248d12dc820ede8a581f4eac107fa6446c2222
font_02_sfnt_off00007ee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE4 7960 bytes
SHA-256: cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2
font_03_sfnt_off0000920a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x920A 18248 bytes
SHA-256: 8779a24c74e66c23b33121dd1a71955adfc2f322ab09b0870da4a74651533123
font_04_sfnt_off0000b3d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3D1 4272 bytes
SHA-256: fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0

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