Malicious PDF — malware analysis report

Static analysis result for SHA-256 317369e61ea9e2b4…

MALICIOUS

PDF

34.0 KB Created: 2021-07-09 02:26:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 58de3ec6ec0cca275a8de0cf45de8cbe SHA-1: b595f38408196d1567cb4e589aea7dd398ae3f9b SHA-256: 317369e61ea9e2b400bd42562e677c8262dd8bd5d804e4ee21f91ae498e80bcb
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 0.9980

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.tw/app/479516143/minecraft-servers-that-allow-hacks-game-hack PDF link annotation
    • http://www.sbairs.com/datas/files/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-rare-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/roblox-console-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-hacks-for-gold-cards_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-spin-coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-free-stuff-links_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/roblox-source-code-hack_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-hack-unlimited-spins-apk_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/roblox-treelands-free_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-roblox-promo-codes-2021-april_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-robux-with-no-verification-2021_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
font_00_sfnt_off0000316a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x316A 21784 bytes
SHA-256: 75b45dff90220dd4bc8e3a38e76032003f1c93a16255bf2bdcf5978eff50cfa7
font_01_sfnt_off00006132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6132 18688 bytes
SHA-256: 52b008c1dee13834d2ec83d98dfe79a40f83e68d5b96d4fb2c84ac72eafae7a4

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