Malicious PDF — malware analysis report

Static analysis result for SHA-256 120ffe68413183cc…

MALICIOUS

PDF

37.1 KB Created: 2021-05-22 22:18:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: c380fb348092c99b1971acf095b7006a SHA-1: f1931ba3a529398ec9d14d22a9a566197cde10e6 SHA-256: 120ffe68413183ccfbadbff659c8417da8cc71b8e29990dc8b6c4d7c5ba50084
200 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, disguised as 'free generator' or 'game hack' lures. The document body explicitly instructs the user to click a link or press Win+R, consistent with social engineering tactics to bypass security measures and execute malicious content. The ML classifier also flagged this PDF as malicious, increasing confidence in its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/how-to-get-minecraft-dungeons-for-free-game-hack In PDF document text
    • http://fengshui-shop.com.ua/images/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://fengshui-shop.com.ua/images/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://fengshui-shop.com.ua/images/can-i-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://fengshui-shop.com.ua/images/minecraft-free-install_GM479516143.pdfIn PDF document text
    • http://fengshui-shop.com.ua/images/coin-master-free-spins-link-october-2021_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_off00003663.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3663 24764 bytes
SHA-256: 286aaeee5688a6d949ffd6fc640f91ecd6e99fe73d5811b915727f55f68f98e8
font_01_sfnt_off00006f52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F52 18472 bytes
SHA-256: 65ee82f26cafa7906902f4dbf8f4098f0781a130d3f16ad2d63d9ccc83542dd0

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