Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef98988142f775b7…

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 20:32:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c88c44a98b82e6e06da3a242af768f6f SHA-1: 82ceee5933c2d021a4b5f20521429215f5d7d08c SHA-256: ef98988142f775b7a09fc1e6b943f09b62a254705ac990522ee527b6b73592bb
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/406889139/daily-coin-master-free-spins-game-hack PDF link annotation
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/robux-survey_GM431946152.pdfIn PDF document text
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/daily-coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/free-roblox-hair-boy_GM431946152.pdfIn PDF document text
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/coin-master-34-4-hack_GM406889139.pdfIn PDF document text
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/cheat-aimbot-roblox-mdiafire_GM431946152.pdfIn PDF document text
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-april_GM406889139.pdfIn PDF document text
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/how-to-get-tiktok-famous-free_GM835599320.pdfIn PDF document text
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/cheat-engine-roblox-2021-work_GM431946152.pdfIn PDF document text
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/coin-master-hack-trick-2021_GM406889139.pdfIn PDF document text
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.pdfIn PDF document text
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/robux-gives-roblox-haks-free-roblox_GM431946152.pdfIn PDF document text
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/coin-master-hack-spins_GM406889139.pdfIn PDF document text
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/coin-master-hack-mod-game-download_GM406889139.pdfIn PDF document text
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/free-minecraft-skins-java_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3166 22492 bytes
SHA-256: ce00a23714b0b279b9bfa763de24d2140b988faa44efd29bd111c6df01c36689
font_01_sfnt_off000063b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B1 18596 bytes
SHA-256: f67cf45397c25494501e3e9871b79c38ca25439d2209cefdb99d193c8fd940d5

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