Malicious PDF — malware analysis report

Static analysis result for SHA-256 42f3f6674d04a960…

MALICIOUS

PDF

40.8 KB Created: 2021-05-15 06:06:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e2012cd825d4a52de1feef255edde555 SHA-1: 01bef0ce59b696cb6a29be68138fedef665cfac6 SHA-256: 42f3f6674d04a960c16b41e3e4e0058363571d43590c6ebfe98173ac5d24a24f
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/479516143/minecraft-hacks-list-game-hack PDF link annotation
    • http://sudamericarural.org/images/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/robux-offers_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • http://sudamericarural.org/images/minecraft-free-apk-java-edition_GM479516143.pdfIn PDF document text
    • http://sudamericarural.org/images/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/add-robux_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://sudamericarural.org/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/robux-com-free-robux_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_off0000489d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x489D 24008 bytes
SHA-256: fe32c5faf7865e3734939e49f49b11194e2384cb85ac2da8507723ceeadf9bcb
font_01_sfnt_off00007e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E9B 17740 bytes
SHA-256: c2e082955acc44a54c2cd6792e97aac33f079296fe9f17b7b430410190c0edcd

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