Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d3db33de429ff60…

MALICIOUS

PDF

35.0 KB Created: 2021-07-06 00:21:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b9fb62007d7c773955f3d6f0ebc1aa61 SHA-1: 80fa7c8486c73f18910eecf6c9d877953d2b56f5 SHA-256: 2d3db33de429ff606246e92ec0df5f9e57688ce9853847412618506b1999ed6c
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-freebies-2021-game-hack PDF link annotation
    • http://www.elearning.mtsnkanigoro.sch.id/__statics/gudangsoal/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://www.elearning.mtsnkanigoro.sch.id/__statics/gudangsoal/files/coin-master-free-spins-app-android_GM406889139.pdfIn PDF document text
    • http://www.elearning.mtsnkanigoro.sch.id/__statics/gudangsoal/files/earn-robux-sites_GM431946152.pdfIn PDF document text
    • http://www.elearning.mtsnkanigoro.sch.id/__statics/gudangsoal/files/roblox-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkanigoro.sch.id/__statics/gudangsoal/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.elearning.mtsnkanigoro.sch.id/__statics/gudangsoal/files/daily-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.elearning.mtsnkanigoro.sch.id/__statics/gudangsoal/files/free-robux-android_GM431946152.pdfIn PDF document text
    • http://www.elearning.mtsnkanigoro.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnkanigoro.sch.id/__statics/gudangsoal/files/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkanigoro.sch.id/__statics/gudangsoal/files/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.elearning.mtsnkanigoro.sch.id/__statics/gudangsoal/files/coin-master-free-spins-moonactive_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnkanigoro.sch.id/__statics/gudangsoal/files/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elearning.mtsnkanigoro.sch.id/__statics/gudangsoal/files/get-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnkanigoro.sch.id/__statics/gudangsoal/files/counter-blox-roblox-offensive-hack-v3rmillion_GM431946152.pdfIn PDF document text
    • http://www.elearning.mtsnkanigoro.sch.id/__statics/gudangsoal/files/1-million-free-robux-landon_GM431946152.pdfIn PDF document text
    • http://www.elearning.mtsnkanigoro.sch.id/__statics/gudangsoal/files/roblox-community-hacker_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkanigoro.sch.id/__statics/gudangsoal/files/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkanigoro.sch.id/__statics/gudangsoal/files/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnkanigoro.sch.id/__statics/gudangsoal/files/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnkanigoro.sch.id/__statics/gudangsoal/files/free-robux-only-1-step_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_002_off0000316b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x316B 23056 bytes
SHA-256: 9346279ae1d465235d9ddfb1c26ddd6434b92ab20baf24b400a700c67b5b1815
font_01_sfnt_off00006539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6539 18556 bytes
SHA-256: 099d1788409087ddfbe33754abc9ceefd32c2cc39aea06ca7620bd436a009d22

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