Malicious PDF — malware analysis report

Static analysis result for SHA-256 7719a1c1225d6d42…

MALICIOUS

PDF

53.8 KB Created: 2021-05-11 16:29:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3f65d7b06111bc5c193c4d8c3c8fecc3 SHA-1: d51488a6e7cab6396918b5dbc15506a8139e51b9 SHA-256: 7719a1c1225d6d42e9008e3abc0844eb449f3cd501b0a7fd7502a0244376b1b8
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 0.9365

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 https://netcdn.xyz/app/431946152/robux-page-game-hack PDF link annotation
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/app-master_GM406889139.pdfIn PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/hack-roblox-players_GM431946152.pdfIn PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/robux-offer-wall_GM431946152.pdfIn PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/free-coin-master-spins-and-coins-for-daily_GM406889139.pdfIn PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/how-can-you-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/coin-master-on-facebook_GM406889139.pdfIn PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/how-do-you-get-roebucks-for-free_GM431946152.pdfIn PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/coin-master-free-spin-game_GM406889139.pdfIn PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/coin-master-game-hack-online_GM406889139.pdfIn PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/free-avatar-roblox_GM431946152.pdfIn PDF document text
    • https://belajar.mtsn4malang.sch.id/__statics/gudangsoal/files/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ecd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ECD 24716 bytes
SHA-256: c863f01cd487e035499a4feb2fcb5d70bbdcc79d4cfb77ed48efc397f2b8f551
font_01_sfnt_off000087cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87CC 12800 bytes
SHA-256: db399d969d9309c9c38cb6e3c43aa83c06d227a5470715de93176d1df1e6747d
font_02_sfnt_off0000afa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFA9 18520 bytes
SHA-256: 5c5a9e016ebd8405bc7924fb9e9ebc34b94767cfb6a9fd13d56cd9d284b9d9b8

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