Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f7c9e1e28ebc597…

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 00:28:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 57a3b1ae7aecc3946ae2579bdc6bad86 SHA-1: 5054f6bceb7fb6cd83fc41b922b99ccbd9ac7a24 SHA-256: 5f7c9e1e28ebc59757eecaf315797a9ca0c71c271003e6d6c679d460b61f5972
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-free-spins-hack-game-hack PDF link annotation
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/free-robux-no-password_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/hacks-for-roblox-counter-blox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/free-coin-master-gift-link_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/free-robux-please_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/oprewards-com-earn_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/como-hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/coin-master-hack-unlimited-spins-apk_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-download-today_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2-5-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/free-spin-and-daily-news-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/free-roblox-avatar-ideas_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/free-roblox-card-codes_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/roblox-robux-hack-free-robux-generator-uirbx-club_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/free-minecraft-skin-creator_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/games-that-can-be-hacked_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_off000031e9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31E9 22428 bytes
SHA-256: f4a2cbe792e019e6f60cf1e2566e3c8dd8e9b29ae44de501e451342f03a7b909
font_01_sfnt_off000063cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63CD 18344 bytes
SHA-256: bda74eba5f039297e511dddd57f660cdccd001576784cab1ba2dc4ebdf08fb85

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