Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f5d93451ad41ba8…

MALICIOUS

PDF

34.6 KB Created: 2021-05-23 12:39:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a5b7e86b148506d0e71eb0e863878d4d SHA-1: 470cb5b05b5d9943c894961edbfd29375abfe428 SHA-256: 3f5d93451ad41ba8d8f0a82620b46f6c906f2a1a52933f1e99a93a8a354db684
170 Risk Score

Malware Insights

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

The PDF document contains a critical heuristic firing for a malicious redirector link, pointing to a "free Minecraft Bedrock Server Hosting" lure. This lure is designed to trick users into clicking the link, which leads to malicious infrastructure. The document also contains a heuristic for ClickFix social engineering, instructing users to press Win+R or paste a command, indicating an attempt to bypass macro restrictions and execute arbitrary commands.

Machine Learning

  • Nyx PDF Classifier clean score 0.0718

Heuristics 5

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/479516143/free-minecraft-bedrock-server-hosting-game-hack In 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_off00002d26.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D26 24680 bytes
SHA-256: 81dcc8a92b7f70ca955cd79db1b25570ba04a6e2722e2cd11105e04245376bf5
font_01_sfnt_off000064e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E9 18672 bytes
SHA-256: fcf161d812b4feaa3e2bf8e8c417d8656b3909a46e27a4c0a1d90eda073f6fc6