Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b15778d71802b33…

MALICIOUS

PDF

36.9 KB Created: 2021-05-20 16:34:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8bd8d702c38668d8d90ba19e688bbf4d SHA-1: 6d338d1d66c9ceae38e694d53df812e397011d5f SHA-256: 5b15778d71802b337df88f5871de90cdcd8934239e160fcba65f8f3fcefd5f28
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to redirector infrastructure, specifically advertising a 'Coin Master Free Blogspot' game hack generator. The primary redirector URL is https://netcdn.xyz/app/406889139/coin-master-free-blogspot-game-hack, which is flagged as malicious. The document body also contains a call to action to download, reinforcing the lure. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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-blogspot-game-hack In PDF document text
    • https://www.linzgau-kjh.de/images/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • https://www.linzgau-kjh.de/images/free-spins-october-28-2021-coin-master_GM406889139.pdfIn PDF document text
    • https://www.linzgau-kjh.de/images/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://www.linzgau-kjh.de/images/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • https://www.linzgau-kjh.de/images/mcpe-master-hack-unlimited-coins-download_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_002_off00003236.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3236 30012 bytes
SHA-256: 1dfd1c8c8e9a4fdf174646eccea617f6e9c8962107455746b5c1e9da35371ee6
font_01_sfnt_off00006e97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E97 18464 bytes
SHA-256: 3d1506adb004325b5ad849f11167115e1f90dbd1428f7e6d98779d75984a0c30

Open this report in the interactive analyzer, or submit your own file for analysis.