Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fbbbf5954c60efc…

MALICIOUS

PDF

33.5 KB Created: 2021-07-07 23:34:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: de7b6dff575b746df9a084e6afb5a192 SHA-1: 16d847384b533d2b633c09deaf7003f0c5fbc6ca SHA-256: 2fbbbf5954c60efcaf450a7429185b8d91510b9af6fc610dfce5d13d6b9fd916
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/406889139/free-coin-master-coins-game-hack PDF link annotation
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/minecraft-complete-handbook_GM479516143.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/minecraft-free-education_GM479516143.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/get-free-coin-master_GM406889139.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/game-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/roblox-microsoft-rewards_GM431946152.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/code-free-robux_GM431946152.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/how-to-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/minecraft-xbox-360-free_GM479516143.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/roblox-free-play-no-download_GM431946152.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/robux-free-robux_GM431946152.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/coin-master-cards-free_GM406889139.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/robux-hack-2021-on-phone_GM431946152.pdfIn PDF document text
    • https://man1-kotagorontalo.sch.id/__statics/gudangsoal/files/minecraft-18-9-hacked-client_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
stream_002_off00002fa9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FA9 22168 bytes
SHA-256: 3170890d1bf80cd38399663dd536bb59009e7d96c6eb86905b508455e33327b5
font_01_sfnt_off0000610a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x610A 17996 bytes
SHA-256: e3fb1ca426c01543f38f1d1129ae452bef28a40365fbe99abf1b239340e30419

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