Malicious PDF — malware analysis report

Static analysis result for SHA-256 2103704aaee5aeaf…

MALICIOUS

PDF

42.2 KB Created: 2021-05-13 06:17:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 87883aa3401b725b9e92acb3a4bade55 SHA-1: be0d3704471bc2751f3bf2860e316c0e30ab60c1 SHA-256: 2103704aaee5aeaf1a7173d629043201b6f14482eaf566df5afc3740c3aa6bc1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. 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 0.9971

Heuristics 4

  • 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.
  • 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/406889139/master-free-spin-and-coin-links-html-m-1-game-hack PDF link annotation
    • http://www.primeinformatica.it/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.primeinformatica.it/images/coin-master-hack-apk-download-latest-version_GM406889139.pdfIn PDF document text
    • http://www.primeinformatica.it/images/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.primeinformatica.it/images/game-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.primeinformatica.it/images/coin-master-hack-apk-35-8_GM406889139.pdfIn PDF document text
    • http://www.primeinformatica.it/images/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://www.primeinformatica.it/images/free-fire-coin-master_GM406889139.pdfIn PDF document text
    • http://www.primeinformatica.it/images/robux-apk_GM431946152.pdfIn PDF document text
    • http://www.primeinformatica.it/images/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://www.primeinformatica.it/images/what-is-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.primeinformatica.it/images/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://www.primeinformatica.it/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.primeinformatica.it/images/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.primeinformatica.it/images/free-minecraft-java-edition-codes_GM479516143.pdfIn PDF document text
    • http://www.primeinformatica.it/images/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://www.primeinformatica.it/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.primeinformatica.it/images/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://www.primeinformatica.it/images/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://www.primeinformatica.it/images/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://www.primeinformatica.it/images/free-robux-hacker-us_GM431946152.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_003_off00004a07.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A07 24456 bytes
SHA-256: e8882a57f53858dc0a14f9e1ccbae84d41b89ad355e6e6c48a98bc79681a791a
font_01_sfnt_off00008183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8183 18672 bytes
SHA-256: e8e5c78a3c75332e87dcced76b09371611da69ae485f860408bab2f18198baf8

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