Malicious PDF — malware analysis report

Static analysis result for SHA-256 5016972dbe426060…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 07:41:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 98f17c2d811c83d26ce0537079bc8ddc SHA-1: 366fd5445c342b0533f447d3f97a9b5fc5084b2d SHA-256: 5016972dbe426060ac10fab77d6cf94eefc22d2ed62f00bdc2fc36c83d410fa1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to a known malicious infrastructure, likely serving as a lure for game hacks or generators. The heuristic firings confirm the presence of malicious redirector links and a high ML classifier score, indicating a strong likelihood of malicious intent. No scripts were extracted from this sample, but the document body and embedded URLs strongly suggest a phishing or malware distribution workflow.

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/minecraft-book-collection-game-hack In PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-hack-tool-v1-9-pc_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/toolbox-for-minecraft-pe-mod-apk_GM479516143.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/free-private-server-roblox_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/coin-master-hack-tool-without-human-verification_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-el-tiger-card-free_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/coin-master-hack-no-verification-no-signup_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-hack-ios-download_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/coin-master-hack-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/free-tiktok-comments_GM835599320.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/roblox-free-download_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_off00003418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3418 21888 bytes
SHA-256: 3089fdaaad81be4ce317d373fff7793965d240bfb4ca8b6fdd46d6374e38c9cc
font_01_sfnt_off000063eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63EB 18460 bytes
SHA-256: d4ee59d4009559a10760f1b4f681366fcc14c243429bee840e8cca7020b3171d

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