Malicious PDF — malware analysis report

Static analysis result for SHA-256 19eccdf985b835c1…

MALICIOUS

PDF

35.4 KB Created: 2021-07-08 20:23:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b5b46f9316a001bd98dd93304da1e592 SHA-1: 1b37c89b41918e21461df1126e2f008d266d916b SHA-256: 19eccdf985b835c170329ad086b97d827e79371c13b8c6e4e8c773e3b0d71f50
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-that-actually-works-game-hack PDF link annotation
    • http://cintabaca.org/katalog/repository/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-wings-of-liberty-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/pubg-uc-wholesale_GM1330123889.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-robux-obby-roblox-game_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/hack-roblox-kali-linux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/hack-roblox-pc-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-robux-codes-for-iphone_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-hack-explot_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-roblox-dlls-hack_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/robux-online-hack-ml_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-coin-master-gold-cards_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-hack-noclip-download_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-robux-come_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-dayz-cheat-engine_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/robux-hacks-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/prisonbreaker16-hack-script-roblox_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_off00003042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3042 22820 bytes
SHA-256: e18ec71085b05236f9c5419a37fcc60f13f573398aff71bfda2a1eba1a480794
font_01_sfnt_off0000639b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x639B 19608 bytes
SHA-256: d52712f1a35e8680be3c45e78173014feb66661a2560c5e73c6934237b8ae3d4

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