Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7addbf60db07715…

MALICIOUS

PDF

33.4 KB Created: 2021-06-18 15:01:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f93f6a5f7bae24e7c990cc6db3fc7f86 SHA-1: ad1e44d05fa8ef14115f82cd368e9aec839bbb61 SHA-256: e7addbf60db0771560264608413145ce99d98e77474f022f911f826759fdc6ae
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks and free items, specifically mentioning Roblox and Coin Master. It includes multiple links, with the primary one being http://netcdn.co/app/431946152/free-catalog-items-roblox-2021-game-hack, which likely leads to a malicious download or phishing page. The ML classifier strongly flagged this PDF as malicious, and the presence of game hack lures is a common tactic for distributing malware or leading users to scam sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-catalog-items-roblox-2021-game-hack PDF link annotation
    • http://zercalo.org/images/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/how-to-hack-dbfp-roblox_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-free-spins-no-survey_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/how-to-get-free-gold-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/how-to-get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/hacks-for-roblox-high-school_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-hack-apk-35-18_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/free-robux-real_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-spin-hack-link_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/free-robux-now-2021_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/free-tiktok-likes-no-human-verification-or-downloading-apps_GM835599320.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
font_00_sfnt_off00002dd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DD3 21448 bytes
SHA-256: a0c2549ce686869a745f08583308113dd0978b5337b113fb52ca5c14f1c0a2af
font_01_sfnt_off00005ce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE3 19232 bytes
SHA-256: 3b939c591f561f872dd6a238312c47e9d2033c59bd5104c0e5721bcd59244c48

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