Malicious PDF — malware analysis report

Static analysis result for SHA-256 1098f1df65defc9d…

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 08:05:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ab30ebf5bfaf667b994cdb60efd6bb78 SHA-1: dff043acebd7c79fe62d02d122811b90e11bf7ce SHA-256: 1098f1df65defc9dcb9da0019ed39009dba975a4d1b77cdc4287277f8c33a2f3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to a malicious redirector infrastructure, specifically advertising free game hacks and currency generators. The ML classifier strongly indicated maliciousness, and the presence of redirector links confirms a malicious intent to lure users to potentially harmful sites. No scripts were extracted, but the document's structure and embedded links are sufficient to infer 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/free-roblox-injector-game-hack In PDF document text
    • http://library.umla.ac.id/repository/free-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-800-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/pubg-uc-with-jazz-cash_GM1330123889.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-ben-ten-universal-showdown-cheat-codes_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-unlimited-spin-hack_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/boku-no-roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-complete-handbook_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/unlimited-robux-hack-add_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/rewardex-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/minecraft-items_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-today_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_off00002f75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F75 22452 bytes
SHA-256: 97ae9a7a8099787685d2289028149e980f5bfccbe64ab9baa7f1ccb6993ee5a3
font_01_sfnt_off00006191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6191 18944 bytes
SHA-256: a46d9ddbb6334d284056799314f5e85b9d3b171abb92ec665d893bb118be9f5f

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