Malicious PDF — malware analysis report

Static analysis result for SHA-256 55283cfdd8823549…

MALICIOUS

PDF

34.5 KB Created: 2021-07-06 02:33:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1d40b03312582f244a0779fc30a070df SHA-1: cbbfd028a20de207461be73bdb2839c346e2c75e SHA-256: 55283cfdd88235494d90fc7668817fe56f05dc99f1468bd473f9900e8e469b5c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure related to game hacks and free generators, directing users to a known malicious redirector. The embedded URL is designed to trick users into downloading potentially unwanted or malicious content. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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 http://netcdn.tw/app/479516143/how-to-download-minecraft-for-free-on-your-phone-game-hack In PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/free-spin-coin-master-link-download_GM406889139.pdfIn PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/do-new-roblox-player-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/como-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/tiktok-free-food-vending-machine_GM835599320.pdfIn PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/roblox-khol-admin-free-roam_GM431946152.pdfIn PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/roblox-free-hats-catalog_GM431946152.pdfIn PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/wwwcoin-master-free-spincom_GM406889139.pdfIn PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/hack-roblox-robux-free-pastebin-com-https-pastebin-com-qqcutpsq_GM431946152.pdfIn PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/roblox-free-clothes-website_GM431946152.pdfIn PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/coin-master-game-hack-kaise-kare_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
font_00_sfnt_off000031bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31BD 21892 bytes
SHA-256: 19946bb6fec047b9b8fba5a56e1788438282cc073c7c47864845ff4cf87d9a7e
font_01_sfnt_off00006197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6197 19200 bytes
SHA-256: 31e18e1ffba7b510e955ea1110d9d59f3afbf889ecba4993910640c0150a390e

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