Malicious PDF — malware analysis report

Static analysis result for SHA-256 174be98874bcd4c4…

MALICIOUS

PDF

42.7 KB Created: 2021-05-10 15:32:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e1521918a321f7d29126537863ebfc21 SHA-1: 981f21b08c4a7fd05ce006ebde89f6986ea0a1bf SHA-256: 174be98874bcd4c4afb5e37d18902aa75157ba4792093da5b5e1b4bdf64eed25
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks and free spins, directing users to a suspicious URL. The ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to a malicious site, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/coin-master-free-spins-link-download-today-game-hack PDF link annotation
    • http://library.ulb.ac.id//repository/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/worst-roblox-avatars_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/how-to-hack-a-minecraft-account_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-tool-hack_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/hack-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/how-to-scam-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/toolbox-mod_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-free-spins-today-39_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/fast-robux-online_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-coins-and-spins-in-coin-master_GM406889139.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_003_off000049b1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49B1 25056 bytes
SHA-256: afd43daa5452101aa79bfbe16ef70c8209cd14c28170b0d9401787addec0ad22
font_01_sfnt_off000082d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82D9 18816 bytes
SHA-256: 7984ac734f2c2edb41e517847f194607c55f1e409037ad7870af27278dae38db

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