Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2a5fac94bbd3a87…

MALICIOUS

PDF

33.6 KB Created: 2021-07-05 15:52:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: bec41443af41d826c8869df6036b1c4f SHA-1: 2b2905809f2fb881d8ab471aee51e486428fd2e3 SHA-256: d2a5fac94bbd3a87288906e4f5d45e65d039e7e2000ec8f7804b5e707982a208
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/coin-master-coins-free-game-hack PDF link annotation
    • http://opac.kolejkrim.edu.my/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-free-clothes-and-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/any-cheats-for-tycoon-roblox-games_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/fighting-free-card-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/hoodie-t-shirt-roblox-free_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/secret-free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-hacks-intitle-indexof_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/hack-roblox-net-one-handynummer_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/sentinel-exploit-roblox-free_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-free-set_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/synapse-hack-for-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-attack-madness-hack_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/funny-free-roblox-t-shirtd_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-free-robux-apple-phone_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-no-hack-robuxian_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-codes-october-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-no-offers_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
font_00_sfnt_off00002fa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FA9 22356 bytes
SHA-256: 9f44352734bc7db304cd37f202fd4b7c989faec1633242cc85f9a26cf93b7b99
font_01_sfnt_off0000617c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x617C 17996 bytes
SHA-256: 2ec206c530faa3d40eac36f14655b3e9b935e9ff12c648634e177d5bc9421463

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