Malicious PDF — malware analysis report

Static analysis result for SHA-256 b09f23b55424acc2…

MALICIOUS

PDF

34.5 KB Created: 2021-07-07 20:31:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 69ab69bfa74cee24e8a67aeb279bd6de SHA-1: 82910f129d2cfa8416fe00dca1968d3a8033d5a8 SHA-256: b09f23b55424acc2ef7488d7eb21a028d01046dfe72762a05b3dbc8906793fec
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/haktuts-2021-coin-master-free-spin-link-game-hack PDF link annotation
    • http://library.umla.ac.id/repository/free-roblox-boy-hair_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/auto-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-generate-free-robux-hacks_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-roblox-codes_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-hack-cheat-generator-d_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/online-robux-hack-no-download_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/can-you-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-roblox-items-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-online-hack-link_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-come_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_off0000627d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x627D 18884 bytes
SHA-256: 7fbaae8c74c80ad8c6004c185d9f2f033924c4f14cdb292a6e337190a643b689
font_00_sfnt_off00002eab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EAB 23072 bytes
SHA-256: 01760db8b457dc8dbfe06519dce9e0bd845cf1237b2f67ab6ed596a72c00ef65

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