Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5d5d3947b9c3c12…

MALICIOUS

PDF

36.1 KB Created: 2021-07-03 17:29:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 8ed381056677e7727ead7e0a19803b72 SHA-1: 088b343381e759d2faaf34be0b2920a9ea33fa93 SHA-256: d5d5d3947b9c3c12ff7c305e51c79266a67e7c43d55c6308d4e9105442a32513
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering game hacks and free in-game currency, identified as malicious redirectors. The document body and embedded links strongly suggest a lure to phishing or malware download sites. While no scripts were explicitly extracted, the nature of the links and the heuristic firings indicate a high likelihood of leading to malicious content.

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/479516143/aristois-minecraft-hack-game-hack In PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-get-free-hats-on-roblox-without-inspect-element_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/hack-welcome-to-farm-town-beta-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-redeem-code-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-free-spins-2021-today_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/captian-underpant-book-in-roblox-gives-you-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/todos-los-hacks-de-check-casher-v3-roblox-prision-life_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-cheats-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/robux-hack-v1-0_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-spin-link-of-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-hack-kavra-rolplay_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-printables-free_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/3-games-that-will-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-get-free-robux-without-doing-a-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-unlimited-spin-apk-free-download_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/inject-hack-roblox-hack_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_off00003839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3839 22792 bytes
SHA-256: 9b10fead281dbaa4f79349d31d7fb6439f1241f269fce94af55ca67d29127b70
font_01_sfnt_off00006ad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD6 18168 bytes
SHA-256: 271777a136a6f3efdfa034c086a74476d42872276a2731bd80599829abd26f21

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