Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a9a83846cfaf2d2…

MALICIOUS

PDF

46.0 KB Created: 2021-06-08 14:05:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b23366d2a7d418d7eaec5d7dcf3c806b SHA-1: 2847e1e696f48406b493992a6c598e78fdc63228 SHA-256: 6a9a83846cfaf2d2e9b1784bcfc1ab6c66056f6bde1b204e55af2cbaa738b476
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 0.9864

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.tw/app/431946152/how-to-get-free-robux-with-roblox-redeem-card-game-hack PDF link annotation
    • http://schoolsupportandbeyond.org/images/new-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/edm-reaper-free-robux-april-2021_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/minecraft-noob-vs-pro-vs-hacker_GM479516143.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/coin-and-spin_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/500-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/roblox-robux-hack-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/coin-master-connection-lost_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/coin-master-daily-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/roblox-hacks-name_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/client-minecraft_GM479516143.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_off000051a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51A6 26436 bytes
SHA-256: da173c12654abf2cc4de57cfa6194db6b24bb3baebdfb59b97b51c3603a2955e
font_01_sfnt_off00008ddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DDD 19504 bytes
SHA-256: c116ffdb75fe22fb9cd06668a888bc47330692db9506fd0e4a6571911a86d82c

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