Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b3f7934a151d4c8…

MALICIOUS

PDF

34.0 KB Created: 2021-07-04 02:47:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9d85ac219b2fcf1ddfa4174cc7d3833a SHA-1: e301f8380d8a1a4816ea5b66857ac0fa0de43098 SHA-256: 5b3f7934a151d4c8014b634cb5a0f339e5b5aa79a5a9132ab4b377653d72006e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency (Robux) and hacks to entice users to click on embedded links. The primary link, http://netcdn.tw/app/431946152/free-robux-pass-hacker-game-hack, is identified as a malicious redirector, likely leading to further malicious content or malware. The document's structure and embedded URLs suggest it is part of a phishing or scam campaign, potentially using T1059.007 (JavaScript) if any active content was present, though none was explicitly detailed in the provided evidence.

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/free-robux-pass-hacker-game-hack In PDF document text
    • https://new-era.com.tw/image/data/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/free-robux-no-human-verification-or-offers_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/hack-roblox-100_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/how-to-get-free-tix-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/minecraft-java-code-free_GM479516143.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/give-me-robux-now_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/roblox-free-items-2021-thumbnail_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/mcpe-master-hack-unlimited-coins-download_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/minecraft-112-2-hacked-client_GM479516143.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/coin-master-32-android-mod-hack-apk-download_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_off00002e87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E87 22420 bytes
SHA-256: fffef39cc1914f901de2dda71b34c1b67d82fef9a8244293b2c30632b4e67525
font_01_sfnt_off00006091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6091 18852 bytes
SHA-256: cf730de20ff104fe907cf09cfa94f16bb5825d206653e7a92f4b3c0b72af3f73

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