Malicious PDF — malware analysis report

Static analysis result for SHA-256 94da13e8729f8e3d…

MALICIOUS

PDF

36.2 KB Created: 2021-07-05 14:44:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 47e81215aa7f0ca12f6282555240d348 SHA-1: 0ebad9adde331e07322beda6fcc4a6f7555ba8d2 SHA-256: 94da13e8729f8e3d9dcf47150680a058b59a10f7b3a757ee23e30b4826ed82c8
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users to malicious redirectors and SEO link farms, masquerading as generators for in-game currency or game hacks. The primary URL, http://netcdn.tw/app/431946152/free-robux-no-download-2021-game-hack, is identified as a malicious redirector. The document body and embedded links indicate a social engineering tactic to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-no-download-2021-game-hack In PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/free-robux-exploit-2021-no-virus_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/free-acounys-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/sandra-how-to-get-free-items-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/free-robux-generator-no-human-verification-2021-on-pc_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/how-to-get-anything-you-want-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/how-do-you-do-interest-free-roblox-games_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/free-robux-no-survury_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/free-robux-no-download-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/bloxburg-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/how-to-hack-robux_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_off000033aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33AA 22720 bytes
SHA-256: e19c0729d7de42ac657db10072f3805f5ea375ac390e6a208b8fc8e22a5e7e95
font_01_sfnt_off00006658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6658 19696 bytes
SHA-256: fd175fa63a9d849a3ab7211978619fd46f10f8aadb12a2eebb0c3911bfcb6147

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