Malicious PDF — malware analysis report

Static analysis result for SHA-256 be493f4f6199b329…

MALICIOUS

PDF

35.4 KB Created: 2021-07-07 11:09:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 1de5dbeddcd7d0e6d7b5fa84e71fecf7 SHA-1: 4e35c3148f6360ddc776a793401c7f44e161125f SHA-256: be493f4f6199b3294c8677a4d098e2b778c686728ee5a5440f6db61aeecce401
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic firing for linking to a game hack lure, specifically mentioning 'free generator / game hack'. The embedded URL, http://netcdn.tw/app/431946152/oprewards-robux-game-hack, directly supports this lure. While no scripts were extracted, the PDF structure and embedded URLs strongly suggest a social engineering tactic to redirect users to a malicious site.

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/oprewards-robux-game-hack PDF link annotation
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/roblox-jailbreak-noclip-hack-2021_GM431946152.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/game-hunters-coin-master_GM406889139.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/download-coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-android_GM406889139.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/coin-master-free-spins-cheat-codes_GM406889139.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/roblox-high-school-games-for-free_GM431946152.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/free-robux-hack-easy-2021_GM431946152.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/youtube-roblox-jailbreak-hacks-no-virus_GM431946152.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/robuxglobalcom_GM431946152.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/minecraft-launcher-free_GM479516143.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/free-roblox-toy-codes-june-2021_GM431946152.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/how-do-i-get-robux-on-roblox_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_off000033ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33ED 22208 bytes
SHA-256: da4baebbe6d368672f0d97c675318a0d265c7908a8f37731d958deec002b2beb
font_01_sfnt_off00006535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6535 19068 bytes
SHA-256: 9248ed4d3d54ba3ef19613beb3441d29a31be10cd8ccf75546374223402ff5b7

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