Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2639d7dbb1dfb9b…

MALICIOUS

PDF

33.7 KB Created: 2021-07-05 23:17:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: be11c132561da165ce6403a66c869972 SHA-1: 579ec7e1388e4a65b35bfdb3a90f1ca8c0e25b8f SHA-256: c2639d7dbb1dfb9b05735c6d1f4e54540814d01f75207b64a434924106cf7656
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free currency to entice users to click on links. These links lead to malicious redirectors and further PDF files, indicating a chain designed to deliver potentially unwanted or malicious content. The primary redirector URL is http://netcdn.tw/app/406889139/coin-master-100-spin-game-hack, which is associated with known malicious infrastructure.

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/406889139/coin-master-100-spin-game-hack In PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/roblox-dll-hack-2021_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/old-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/gamehunters-club-coin-master_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/coin-master-free-attack_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/magitan-hack-keeps-crashing-roblox_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-roblox-cookies-discord_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-become-headless-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-get-a-free-private-server-roblox_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/pokemon-go-free-or-alolan-muk_GM1094591345.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-fire-coin-master_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-get-marshmallow-head-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-bedrock-minecraft_GM479516143.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-roblox-chrome-add-on_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/como-hackear-cualquier-juego-en-roblox_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-get-robux-from-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-roblox-t-shirt-template_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/play-minecraft-for-free_GM479516143.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
stream_002_off00002e9c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E9C 22472 bytes
SHA-256: 5084ab70da784ed1d54a252338d8d734fefe83dab250c52a2b1876f7989f419f
font_01_sfnt_off000060a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A4 18288 bytes
SHA-256: e7eedd1d7f2d1bddccca1a35bcbf42f4aa03d5dcfedc55eaf08a1a6e6f1d261c

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