Malicious PDF — malware analysis report

Static analysis result for SHA-256 bde3bc0a772af27b…

MALICIOUS

PDF

35.9 KB Created: 2021-07-01 06:59:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: f9cfeb9d9d6cc8e11eda58b86bc26b9b SHA-1: 7826135e0e685a8e8ba72997f8dc1bfc860e457e SHA-256: bde3bc0a772af27b156044e16487230c2021fa44cb107d7de6f341fe05bb3ee9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on what appears to be a 'free generator / game hack'. The primary link, http://netcdn.co/app/431946152/how-to-get-free-robux-hack-2021-game-hack, is associated with known malicious redirector infrastructure. The document body and embedded URLs reinforce this lure by mentioning free Robux, Minecraft hacks, and other game-related exploits. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or redirection attempt to a malicious site, likely to deliver a secondary payload or conduct further social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.co/app/431946152/how-to-get-free-robux-hack-2021-game-hack In PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/hacker-usernames-for-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/roblox-2021-fly-hacks_GM431946152.pdfIn PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/minecraft-bedrock-free-download-pc_GM479516143.pdfIn PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/jailbreak-cheats-roblox-money_GM431946152.pdfIn PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/minecraft-rtx-download-free_GM479516143.pdfIn PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/free-roblox-toy-codes-not-used_GM431946152.pdfIn PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/roblox-hack-app_GM431946152.pdfIn PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/minecraft-bedrock-hacks-windows-10_GM479516143.pdfIn PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/free-spin-link-coin-master-app_GM406889139.pdfIn PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/roblox-website-hacks_GM431946152.pdfIn PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-download-on-ipad_GM431946152.pdfIn PDF document text
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/rbx-roblox-robux_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_off00003293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3293 22700 bytes
SHA-256: 6810d37396d8df7c577ee00e59383a7c41d294a3f0fe87d30c3c8658bd7ad92a
font_01_sfnt_off0000658f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x658F 19556 bytes
SHA-256: f212cd4c9928ae438aa9e71512a10d010177ec0841fcd267cfedc658cf456714

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