Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dcd9be2bba9d115…

MALICIOUS

PDF

35.7 KB Created: 2021-07-04 21:22:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 781bc10db75de311d65b65276c9d2ec6 SHA-1: 17fe3a8168bded5872b99f5ed87c698d5e11dc86 SHA-256: 1dcd9be2bba9d1156c4d0c5d7416fc993f4e94c988e6560cb6362c346eca8d49
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/479516143/free-minecraft-server-hosting-24-7-game-hack PDF link annotation
    • https://elearning.man1sleman.sch.id/__statics/gudangsoal/files/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.man1sleman.sch.id/__statics/gudangsoal/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man1sleman.sch.id/__statics/gudangsoal/files/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdfIn PDF document text
    • https://elearning.man1sleman.sch.id/__statics/gudangsoal/files/como-hackear-roblox-2021-en-android_GM431946152.pdfIn PDF document text
    • https://elearning.man1sleman.sch.id/__statics/gudangsoal/files/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • https://elearning.man1sleman.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://elearning.man1sleman.sch.id/__statics/gudangsoal/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man1sleman.sch.id/__statics/gudangsoal/files/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • https://elearning.man1sleman.sch.id/__statics/gudangsoal/files/coin-master-spin-hack-apk_GM406889139.pdfIn PDF document text
    • https://elearning.man1sleman.sch.id/__statics/gudangsoal/files/free-cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man1sleman.sch.id/__statics/gudangsoal/files/pokemon-go-free-outfits_GM1094591345.pdfIn PDF document text
    • https://elearning.man1sleman.sch.id/__statics/gudangsoal/files/best-site-for-free-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://elearning.man1sleman.sch.id/__statics/gudangsoal/files/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • https://elearning.man1sleman.sch.id/__statics/gudangsoal/files/free-disney-plus-accounts-tiktok_GM835599320.pdfIn PDF document text
    • https://elearning.man1sleman.sch.id/__statics/gudangsoal/files/free-coin-master-spins-links-2021_GM406889139.pdfIn PDF document text
    • https://elearning.man1sleman.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • https://elearning.man1sleman.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://elearning.man1sleman.sch.id/__statics/gudangsoal/files/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • https://elearning.man1sleman.sch.id/__statics/gudangsoal/files/free-robux-please_GM431946152.pdfIn PDF document text
    • https://elearning.man1sleman.sch.id/__statics/gudangsoal/files/roblox-free-robux-no-verification_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_off00003632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3632 22552 bytes
SHA-256: f7ed5cb4fdd4fcbfafd5d086a58cc86aeb2e01cb303bd4752f7cddf7af166f22
font_01_sfnt_off000068aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68AA 18352 bytes
SHA-256: 91a7490c887560cf1db9cb18ebb1e2a98db2d1ca6a1740dfb9f9cb38742cb9c1

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