Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8761222099db8d5…

MALICIOUS

PDF

36.6 KB Created: 2021-05-13 09:35:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: c2a8b927cd71ff7f94a63f40059d517e SHA-1: 38c01054cb7161053133d1021fe9a55d362f3d6c SHA-256: f8761222099db8d5be8f6ce5e562e48936f299fb3e9aed82ce9b1db50477050f
170 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to known malicious infrastructure, disguised as a 'free generator' or 'game hack'. The document body explicitly mentions 'Free Minecraft Java Code' and includes a call-to-action button, indicating a social engineering lure. The presence of a password-protected archive lure suggests an attempt to bypass security controls by encrypting the actual payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.0312

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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-java-code-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_003_off0000341f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x341F 25428 bytes
SHA-256: 1ea5ac3b0a0c98ac850b8addd11ff538d3a26ce60f88fd3a18cdbc6fbd3f615a
font_01_sfnt_off00006e47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E47 18164 bytes
SHA-256: 3d382267cf92eff76cd83df568b6b4b4ad7e52a7e56d0c7bee3103fe475e98f9

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