Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cb75f78c1dee995…

MALICIOUS

PDF

43.0 KB Created: 2021-05-13 20:10:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1036871f0247d81815f4f13c7b10b385 SHA-1: 3079cf518b6a787cb61a0310335441f15201c2eb SHA-256: 9cb75f78c1dee995c784312dd2683d4c1bec576f76d04fc366804c3a04ae9dbd
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 0.9971

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/406889139/60-free-spins-on-coin-master-game-hack PDF link annotation
    • http://mohacad.com/images/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/roblox-rewards-site_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-card-hack-apk_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/static-moonactive-net-free-spins_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/how-to-make-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • http://mohacad.com/images/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://mohacad.com/images/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/cute-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-hack-pro_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/coinmasterfree_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
stream_003_off00004c28.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C28 25044 bytes
SHA-256: e324d090bd1dd7f70a47c3e98eea5df054b3162e11c28191ea63f108172c1537
font_01_sfnt_off000085eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85EB 18224 bytes
SHA-256: fb8ca16964c1cfb5d3ac46424d3104c0504772e256342925334c3af996e4fdd1

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