Malicious PDF — malware analysis report

Static analysis result for SHA-256 3869d001cbd684d2…

MALICIOUS

PDF

34.5 KB Created: 2021-06-29 00:54:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: fa7c98781ff6b643c2bdbe84c4bc4f5f SHA-1: c87e8b5a80372468b82a1ad6b81b0608320b75d9 SHA-256: 3869d001cbd684d2fd9ea93afbb956b7e8e8a826c86c21096e61104ba158b40e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one pointing to known malicious redirector infrastructure at http://netcdn.co/app/431946152/faces-on-roblox-that-cost-for-free-game-hack. This lure is designed to trick users into believing they are accessing free game hacks or generators. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

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.co/app/431946152/faces-on-roblox-that-cost-for-free-game-hack In PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/lua-code-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/games-that-get-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-script-hack-gui_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/the-neighbourhood-roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-hack-2021-app_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-coin-master-spins-and-coins-for-daily_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-rank-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-get-free-robux-no-survey-or-verification_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/is-roblox-free-on-nintendo-switch_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-get-free-robux-on-ipad-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/fb-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-easy-and-fast-2021_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_off000030e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E6 22116 bytes
SHA-256: a50add892ec4f2bb2ea60667db88339bc94945758cc71ff8c6e61348f01ba0dc
font_01_sfnt_off000061fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61FD 18920 bytes
SHA-256: 8b3c13ccb56130d2726591e05816c100b5a14cc0f975d516735bda3315022ff6