Malicious PDF — malware analysis report

Static analysis result for SHA-256 78e0317d80842aa5…

MALICIOUS

PDF

35.4 KB Created: 2021-07-08 15:07:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c12c87d0da8bee0a509c0f3b7c5dda17 SHA-1: b6485d5bf670d505dad4636139c4057e2e8559b6 SHA-256: 78e0317d80842aa5a5c1cd2d6b87f896597cf659b20de471e0b8446dd9f6c724
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary focus on luring users with "free Robux" and "game hacks." The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates a malicious intent to redirect users to potentially harmful sites. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the document's structure and embedded links suggest a phishing or scam attempt.

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/robux-today-game-hack PDF link annotation
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification-fpr-real_GM431946152.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/how-to-get-badges-free-in-roblox_GM431946152.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-and-tix-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/rbxfree-free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/daily-spin-coin-master-free_GM406889139.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/freespinandcoin_GM406889139.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/roblox-studio-free-download_GM431946152.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/is-minecraft-java-free_GM479516143.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/instant-robux_GM431946152.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/free-robux-videos_GM431946152.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/how-to-make-a-dominus-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/latest-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/apk-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/hacks-to-get-robux-in-tower-of-hell_GM431946152.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • https://elearningmts.alhidayahwanti.sch.id/__statics/gudangsoal/files/coin-master-free-coins-link-2021_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_off00003341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3341 22440 bytes
SHA-256: b0173211ad532d3ebb5feeeb581637921e7192419c2c531b04e237a2ce552420
font_01_sfnt_off00006588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6588 18904 bytes
SHA-256: 2027c49f68bbeff3a315e031b7bcb34a95dd5d98227dd3ac67cfce58e7160adc

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