Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e79121f1118c0ac…

MALICIOUS

PDF

36.2 KB Created: 2021-05-25 11:30:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2162fdce7d2f3cbcaaea6ca7436b4a79 SHA-1: 57fcf4a6502abf4afaf0f8ed89a787d3c3d85f72 SHA-256: 6e79121f1118c0ac7f5378c56deda3fcf191caeb40bee5d01ee38a338605fbc3
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF document was flagged as malicious by an ML classifier. It uses a ClickFix paste-and-run lure and a clipboard-command (paste-and-run) lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

Heuristics 6

  • PDF links to a 'free generator / game hack' redirector high 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-maps-game-hack PDF link annotation
    • http://www.boic.nl/images/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.boic.nl/images/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://www.boic.nl/images/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.boic.nl/images/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://www.boic.nl/images/mcpe-optifine_GM479516143.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_off00003577.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3577 24748 bytes
SHA-256: 0ea8081acef1a9f4bc670dde8e8c008407b7647a7d73e76ad014cd49d7a67558
font_01_sfnt_off00006df7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF7 17744 bytes
SHA-256: 642e76b92f67015eb87e7bb2f8978493590a3d76ebc6958dd5b149369a6bd5f2

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