Malicious PDF — malware analysis report

Static analysis result for SHA-256 0058360652b51dbf…

MALICIOUS

PDF

35.1 KB Created: 2021-07-08 16:20:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 3b7cb85e9b6c57947a3712a6300446cb SHA-1: b218fcaf330f1a81c1b20f5ea1a3563b05a146e9 SHA-256: 0058360652b51dbf377f5a9d51f8e66446169fe1eab90664c9a1b598f2f75031
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple heuristics indicating malicious redirector links, specifically advertising 'free generator / game hack' content. The primary URL identified, http://netcdn.tw/app/431946152/decargar-roblox-hack-scrips-game-hack, is flagged as a malicious redirector. The document body also contains this URL and related terms, reinforcing the lure for potentially harmful downloads.

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/decargar-roblox-hack-scrips-game-hack In PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-pins-for-sale_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-fish-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/cheats-roblox-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-free-spins-23-march-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/anything-free-on-the-catalog-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-tiktok-fans-and-likes_GM835599320.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/card-hack-in-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/cheat-pc-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-hack-tool-v1-9-pc_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-coin-master-spin-in-hindi_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-adidas-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-no-installing-apps_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/v3rmillion-free-roblox-exploits_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-mac-cheat-engine_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/get-me-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-free-games-no-download_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
font_00_sfnt_off000031aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31AA 22496 bytes
SHA-256: d467d20af29a2aedf8e036918cd50e31540be74348b0382eddf2294dd19ad131
font_01_sfnt_off000063dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63DD 19120 bytes
SHA-256: 15280051399fd54d785a82a7419bb9ed7c9a9e788c2baef846fe9f58e22690aa

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