Malicious PDF — malware analysis report

Static analysis result for SHA-256 895bfd1c3c477539…

MALICIOUS

PDF

44.6 KB Created: 2021-05-14 21:17:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b780be6c9e98a8f2327a7ca8263edc88 SHA-1: 49b8b1a6fd1904abe52896d3bb6939a0b5e3f196 SHA-256: 895bfd1c3c477539eefa09fbab949caef66f24f4a3e124363a6f955e16db71bc
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 https://netcdn.xyz/app/406889139/coin-master-hacks-iphone-game-hack PDF link annotation
    • http://christiansymbolkits.com/images/coin-master-hack-app-android_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/coinmaster-free-cards_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/download-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/working-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/roblox-redeem-card-codes-free_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/coin-master-in-app-purchase-hack_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/rare-free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/hack-robux_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • http://christiansymbolkits.com/images/coin-master-for-pc-free-download_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_off00004878.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4878 30440 bytes
SHA-256: 681cb3ba42465c21f7f1396d851db41e2ddf1df12b48f39515d81a75b646f873
font_01_sfnt_off00008cf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CF0 18060 bytes
SHA-256: 9ccc1d8bd8827427bdd2e576ac4afcbf92768d6c7b4bf1f6dc8c42a95cbbb1c2

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