Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c29e5ef2390e81a…

MALICIOUS

PDF

35.5 KB Created: 2021-07-04 08:13:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ae0882dcf39671e5b8a71f4462e92c0e SHA-1: 1491c97fe5f60159424b97b340b24223d44154e9 SHA-256: 9c29e5ef2390e81aa3b6dbc5601794ccd364f9dd45c8703afc97d8fa88d483a9
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/431946152/free-robux-games-that-actually-work-2021-game-hack PDF link annotation
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/roblox-ios-robux-hack_GM431946152.pdfIn PDF document text
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/generator-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/best-free-stuff-in-the-roblox-catalog_GM431946152.pdfIn PDF document text
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/pubg-uc-20210_GM1330123889.pdfIn PDF document text
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/redboy-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/vip-roblox-free_GM431946152.pdfIn PDF document text
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/freecoins_GM406889139.pdfIn PDF document text
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index_GM406889139.pdfIn PDF document text
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/free-premium-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/minecraft-java-free_GM479516143.pdfIn PDF document text
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/coin-master-gold-cards-hack-2021_GM406889139.pdfIn PDF document text
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/free-minecraft-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/free-roblox-svg_GM431946152.pdfIn PDF document text
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/best-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man1bengkalis.id/__statics/gudangsoal/files/coin-master-free-stuff_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
font_00_sfnt_off000031c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31C4 21784 bytes
SHA-256: 9f8477cb503b9d5482c30811592f739f2610b650648649116f7bdab89492ad5f
font_01_sfnt_off000061f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F0 20272 bytes
SHA-256: 3dcbb05b4dce0a2bab4a10db55923dcb732eb0f4a2e9bcb9735c66d658b8cabb

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