Malicious PDF — malware analysis report

Static analysis result for SHA-256 efa5ce8c39b2b585…

MALICIOUS

PDF

35.0 KB Created: 2021-07-04 11:15:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: eaabf55eae5a5b72a40476d7f17159c7 SHA-1: 4b112cba8c4447169ec5dc786af56af908efbdb1 SHA-256: efa5ce8c39b2b58573bea4356ef14ce0d3a09198a57506117a68544241258cb1
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/free-robux-no-verify-2021-game-hack PDF link annotation
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/free-robux-wheel_GM431946152.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/get-more-robux_GM431946152.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/robux-get-com_GM431946152.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/roblox-free-hats_GM431946152.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/free-views-tiktok_GM835599320.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/pubg-4-uccom_GM1330123889.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/coin-master-free-redeem-code_GM406889139.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/robloxcom-avatar-free_GM431946152.pdfIn PDF document text
    • http://elearningmts01sgs.sch.id/__statics/gudangsoal/files/get-a-roblox-account-wiyh-robux-free_GM431946152.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/app-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/cheat-codes-for-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_off00003121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3121 22180 bytes
SHA-256: 63814554c08f555a0578b59903c47db470e0b4c884d1d1b50991fa62d855dd56
font_01_sfnt_off0000620f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x620F 19552 bytes
SHA-256: e09a116ef2773d205446325b2d9f1a936106eb792045e06ccc5d6ea31c8b4aca

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