Malicious PDF — malware analysis report

Static analysis result for SHA-256 c58b0c91e511ab4e…

MALICIOUS

PDF

41.8 KB Created: 2021-05-19 20:03:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 300f7b0c73806d5c91bec177a518b3ab SHA-1: 9a7296888f76e3eddf4a030045db5305f270c056 SHA-256: c58b0c91e511ab4e37d93ab002cb12d1d52bf5bdf34a5df5f31289b365c73811
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 0.9971

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/431946152/how-to-get-free-robux-with-no-verification-game-hack PDF link annotation
    • https://www.acacss.com/images/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://www.acacss.com/images/roblox-how-to-get-free-clothes_GM431946152.pdfIn PDF document text
    • https://www.acacss.com/images/haktuts-coin-master-free-spin-link-today_GM406889139.pdfIn PDF document text
    • https://www.acacss.com/images/roblox-online-free-no-download_GM431946152.pdfIn PDF document text
    • https://www.acacss.com/images/hack-coin-master-android_GM406889139.pdfIn PDF document text
    • https://www.acacss.com/images/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • https://www.acacss.com/images/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.acacss.com/images/blogger-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.acacss.com/images/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://www.acacss.com/images/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • https://www.acacss.com/images/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.acacss.com/images/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • https://www.acacss.com/images/coin-master-free-coins-amp_GM406889139.pdfIn PDF document text
    • https://www.acacss.com/images/coin-master-32-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://www.acacss.com/images/how-to-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://www.acacss.com/images/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://www.acacss.com/images/coin-master-free-raid-link_GM406889139.pdfIn PDF document text
    • https://www.acacss.com/images/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • https://www.acacss.com/images/make-your-own-minecraft-server-free_GM479516143.pdfIn PDF document text
    • https://www.acacss.com/images/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
font_00_sfnt_off0000468b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x468B 24416 bytes
SHA-256: 8938861ace823e8c8d4e712a5ab29e06fe642ef6a7498183a5a998ea3c9c7039
font_01_sfnt_off00007e89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E89 19128 bytes
SHA-256: acb72b37f9b0a7ac0fa23716fb81d4af9379ab539551c05381b29cd372bdbe33

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