Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0716d73f4858bbf…

MALICIOUS

PDF

36.2 KB Created: 2021-07-06 00:24:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ce9e691be054e94d88b3e4bc2a96c452 SHA-1: 6b6239fee1c167a6e94ae744aadb51f6fb2e09b5 SHA-256: d0716d73f4858bbf586005ad17557e1253299e5a154be0bc6ac011ef75a4799f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that lead to a malicious redirector infrastructure, specifically advertising 'free Roblox Premium' and 'game hacks'. The presence of these links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a phishing or scam attempt.

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.tw/app/431946152/how-to-get-roblox-premium-for-free-2021-game-hack In PDF document text
    • https://lib.unitri.ac.id/repository/real-robux-hack-no-survey-2021-febuary_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/como-hackear-roblox-2021-en-pc_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-army-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-pastebin-link_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-hack-in-roblox-jailbreak-on-ipad_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-get-robux-in-roblox-cheat_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-make-a-free-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/is-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-hack-spins-2021_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/tiktok-free-followers_GM835599320.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/100-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-hack-cheat-generator-d_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/mcpe-master-unlimited-coins-hack-apk_GM406889139.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_off00003338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3338 22580 bytes
SHA-256: 37bc5d8a7a774e48528f3924499293e2fde881289729cfe145836ecb817d8674
font_01_sfnt_off000065a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65A4 19992 bytes
SHA-256: 5d92c0ac708cb6372069878ce274a0583dd4db4fed5f7a9ab4827dfd753440d4

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