Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c025235c831f5c1…

MALICIOUS

PDF

35.7 KB Created: 2021-07-07 21:58:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6d41ef195a841f75847c13558814687b SHA-1: 6a19f303c50519c3b07ddbb46d01db5cf515f9c4 SHA-256: 8c025235c831f5c12c60d8528c29c7fac9ac10d3dd8051cc8d24b235a2965818
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/can-you-get-minecraft-for-free-game-hack PDF link annotation
    • http://45.115.65.99/__statics/gudangsoal/files/daily-free-coin-and-spin-link-for-coin-master_GM406889139.pdfPDF link annotation
    • http://45.115.65.99/__statics/gudangsoal/files/robux-for-surveys_GM431946152.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/gratis-hack-royale-hihg-roblox-2021_GM431946152.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/coin-master-free-spins-hacktman_GM406889139.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/coinmaster-com_GM406889139.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/minecraft-skins-download-free_GM479516143.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/coin-master-daily-free-rewards_GM406889139.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/coin-master-heaven-daily-free-spins-and-coins-links_GM406889139.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/coin-and-spin-link_GM406889139.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/free-minecraft-severs_GM479516143.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/how-to-get-hacks-on-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/hacks-para-roblox-agosto-2021_GM431946152.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/free-spins-and-coins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://45.115.65.99/__statics/gudangsoal/files/roblox-password-hacker_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_off000035fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35FC 22784 bytes
SHA-256: c5cdb617c218abe15e666afd94547af7dc463288cca4aa2be9005a4bdf16eca9
font_01_sfnt_off00006933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6933 18300 bytes
SHA-256: c08e82774fe0a81da19594a5cf3907660e0230fba24b2cf17cc79424c62cfd00