Malicious PDF — malware analysis report

Static analysis result for SHA-256 2860bd012e8f40b2…

MALICIOUS

PDF

33.2 KB Created: 2021-07-19 13:46:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d0227e80d7b5c211469b03e741100796 SHA-1: 24950195d4517742bda3db747a10f76679822ef3 SHA-256: 2860bd012e8f40b29193c9f687f2716b4f85b5053e2f595a8e3a02c3036cdd8a
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 0.9938

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-java-free-game-hack PDF link annotation
    • http://learning.ma-negerikarimun.sch.id/__statics/gudangsoal/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://learning.ma-negerikarimun.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://learning.ma-negerikarimun.sch.id/__statics/gudangsoal/files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://learning.ma-negerikarimun.sch.id/__statics/gudangsoal/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://learning.ma-negerikarimun.sch.id/__statics/gudangsoal/files/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://learning.ma-negerikarimun.sch.id/__statics/gudangsoal/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://learning.ma-negerikarimun.sch.id/__statics/gudangsoal/files/get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://learning.ma-negerikarimun.sch.id/__statics/gudangsoal/files/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://learning.ma-negerikarimun.sch.id/__statics/gudangsoal/files/get-free-robux_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_off00002db6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DB6 23364 bytes
SHA-256: 9df1a6ed8a44b1117cee1eb62d98b805be28574ec4c4b181df2f14109548ad32
font_01_sfnt_off00006121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6121 17848 bytes
SHA-256: c651dee67b00b36100d0c208f30a7974f38e9c4fefacd489da3c8fda34869f62

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