Malicious PDF — malware analysis report

Static analysis result for SHA-256 23fa71bc840865b2…

MALICIOUS

PDF

31.8 KB Created: 2021-07-22 02:20:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0a103957d6023280fb087ff49eafad4f SHA-1: 93299ac99ba7d8921b28de0e7412381f917ae79a SHA-256: 23fa71bc840865b2e6101ac8d3b7b33b38fc3d3de27b0d518b1db6ecc92d5e6d
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 0.9900

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/479516143/minecraft-free-ios-2021-game-hack PDF link annotation
    • http://shapemybrows.id/images/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://shapemybrows.id/images/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://shapemybrows.id/images/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://shapemybrows.id/images/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://shapemybrows.id/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://shapemybrows.id/images/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://shapemybrows.id/images/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://shapemybrows.id/images/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://shapemybrows.id/images/free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://shapemybrows.id/images/minecraft-free-online-games_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_off00002a3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A3C 22012 bytes
SHA-256: a494f4b41763cfc52d4ecae486b1d389f319ac820d884de8a2715f5b740cc704
font_01_sfnt_off00005aae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AAE 18112 bytes
SHA-256: b55c1404a277e69c847ae3cf6ace6563469f03eb0031cfae1db94f462975a683

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