Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d75b73d4f077a6c…

MALICIOUS

PDF

49.2 KB Created: 2021-06-03 09:50:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: df742aff581ac60fb90ad17145b80827 SHA-1: d7e9c99c7bb454b0fd405a8db97ce483a16ec2c3 SHA-256: 0d75b73d4f077a6cc89d6982a8ce9c492e8c1e72efac478acffaeefa52de1943
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 0.9796

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.online/app/431946152/how-to-get-free-robux-2021-mobile-game-hack PDF link annotation
    • http://library.gkigadingserpong.org/repository/roblox-re_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/www-robux-redeem_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-xbox-360-free-download-code_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/mcpe-optifine_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-free-app_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-free-version_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/spin-coin_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-2021-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/www-coin-master-hack-com_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/300-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-blogspot_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051ac.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51AC 26932 bytes
SHA-256: 4b39cda9ed63b284ac7ec62afe25acfde07f1d4dcd19c75e23a84358bb2dafd8
font_01_sfnt_off00008e98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E98 3884 bytes
SHA-256: 64ea6bfd232c3abde76d8b86727203bfa3f935a5783cd0c1f642cf6d3fb42b29
font_02_sfnt_off00009b40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B40 19072 bytes
SHA-256: 305d593a8c69a877b7c2b3707dd78cf1514a018b23ddfffc7fe7167110cd04dd

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