Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a7fb7177aa5fc41…

MALICIOUS

PDF

34.3 KB Created: 2021-07-03 19:28:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 25e8dcd347e5735daf4a3fbd5b18f6b5 SHA-1: e1331313f9e8933d505d3a94efd6d3eb4f06feb9 SHA-256: 4a7fb7177aa5fc411f4d0c87b339aef230c2e5dba3777538dd766c675fca1888
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/431946152/rbx-free-game-hack PDF link annotation
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-on-a-phone_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/is-it-safe-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/money-hack-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/free-robux-pins_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/free-robux-2021-april-wow_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/roblox-vehicle-simulator-shakedown-hack-glitch_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/roblox-hack-scripts-list_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/200-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/free-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/xbox-roblox-free_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/all-ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/how-to-scam-for-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/hcbb-roblox-scripts-hack_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/free-stuuf-in-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/roblox-hack-2021-november_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
font_00_sfnt_off0000300b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x300B 23032 bytes
SHA-256: 1e800bfb1ce9db72a86976ef49d20dd603e413732d72d9daf9aba94141659e43
font_01_sfnt_off000062dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62DD 18436 bytes
SHA-256: 2d48a67d745eff34c59410c6f401fc0aadb4d4460c05daa6df5995fc624182e2

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