Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f2b8b921605e141…

MALICIOUS

PDF

45.2 KB Created: 2021-06-08 17:16:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 01009e04846f9a290ddedc92ec2e9f5e SHA-1: 14c0842c61b50c344cadf93323a9d3b2172bd1cc SHA-256: 8f2b8b921605e14175ad76d11bdad05c9e1ac6a22a14ec756373e49c6c84b6e4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a prominent link within the document body, all pointing to sites offering 'free Robux' or game hacks. This strongly suggests a social engineering lure designed to trick users into visiting potentially malicious websites. The ML classifier also flagged this PDF as malicious, increasing confidence in this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9890

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.tw/app/431946152/free-robux-hack-for-ipad-game-hack PDF link annotation
    • https://unsla.uns.ac.id:443/pgsd/repository/hack-coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/free-minecraft-skins-pc_GM479516143.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/roblox-unblocked-at-school-hacked_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/freerubux_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/free-tiktok-likes-generator_GM835599320.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/prison-life-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/free-roblox-passwords_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/coin-master-get-free-spins_GM406889139.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/hack-crack-for-coin-master-currency_GM406889139.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/how-to-download-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005116.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5116 25756 bytes
SHA-256: 5549c2c3dd17bfad07d915d15c315800f18b34014339123dd0c9f7a8944406d4
font_01_sfnt_off00008cca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CCA 18760 bytes
SHA-256: 6d1b1d764f89f170fa5ac81b272e6e7251fa7f2f77c1a54900671b4c0be129f2

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