Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5b65d9133128649…

MALICIOUS

PDF

34.8 KB Created: 2021-07-03 14:12:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: e73a65321c709e29d4d877efc8c60175 SHA-1: 8dfe827dfa9f163dd89ab85f47734e70360f462b SHA-256: f5b65d9133128649939a33afc4c6322d26ba6806b52baa4d0b0fec115520f4b5
102 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 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/how-to-get-minecraft-for-free-on-ipad-game-hack PDF link annotation
    • http://45.115.65.99/__statics/gudangsoal/files/mcpe-master-hack-unlimited-coins_GM406889139.pdfPDF link annotation
    • http://45.115.65.99/__statics/gudangsoal/files/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/comment-cheat-sur-roblox-avec-cheat-engine_GM431946152.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/how-to-hack-coin-master-using-es-file_GM406889139.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/guess-the-character-roblox-free-robux-answers_GM431946152.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/minecraft-free-android_GM479516143.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/getting-free-robux-for-being-13_GM431946152.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/coin-master-spin-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/minecraft-jar-free_GM479516143.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/animations-give-free-robux-robuxian_GM431946152.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/roblox-password-hacker-download_GM431946152.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/coin-master-hack-2021-android_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_off000032f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32F5 22564 bytes
SHA-256: 677f833be204bb2de1746a2564aca6f537486f5ddbd328198cf6ae98843008b4
font_01_sfnt_off000064d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64D0 18512 bytes
SHA-256: 9a5f2a3eec7ab4d8158ce442c8139f99f1f1cb7fd7be9151c1ebe1a4eaf5a268