Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c3a48836bc97884…

MALICIOUS

PDF

41.8 KB Created: 2021-05-16 13:30:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 82da51f90cb77a1f9ba92552da1ce75c SHA-1: 0954d0ec81831d637b8e6f7baf00bcf002fec00a SHA-256: 8c3a48836bc978840ca89ab7f207656ecdf430d7bd3cbe8a5bc7101b17feb496
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a callback-phone (TOAD) 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 0.9971

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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-codes-2021-game-hack PDF link annotation
    • http://www.friendshiptransport.net/images/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.friendshiptransport.net/images/coin-master-pc-hack_GM406889139.pdfIn PDF document text
    • http://www.friendshiptransport.net/images/robuxy-com-generator_GM431946152.pdfIn PDF document text
    • http://www.friendshiptransport.net/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://www.friendshiptransport.net/images/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://www.friendshiptransport.net/images/roblox-website-robux_GM431946152.pdfIn PDF document text
    • http://www.friendshiptransport.net/images/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.friendshiptransport.net/images/download-coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.friendshiptransport.net/images/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://www.friendshiptransport.net/images/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://www.friendshiptransport.net/images/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.friendshiptransport.net/images/extra-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.friendshiptransport.net/images/get-robux-today_GM431946152.pdfIn PDF document text
    • http://www.friendshiptransport.net/images/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://www.friendshiptransport.net/images/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://www.friendshiptransport.net/images/coin-master-hack-online-download_GM406889139.pdfIn PDF document text
    • http://www.friendshiptransport.net/images/free-mojang-account-with-minecraft_GM479516143.pdfIn PDF document text
    • http://www.friendshiptransport.net/images/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://www.friendshiptransport.net/images/free-robux-place_GM431946152.pdfIn PDF document text
    • http://www.friendshiptransport.net/images/free-robux-just-click_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_off00004830.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4830 24936 bytes
SHA-256: 6faf467a857e0f19227893ac83d7747a84a61fa6ea48f8209bc9b8f35afdc751
font_01_sfnt_off00008113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8113 18288 bytes
SHA-256: c3cf5bb4a2b6206e2e9676afab3316ea2b1c646b143759ef858dff5c5e762465

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