Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4241e68e8d1bca3…

MALICIOUS

PDF

35.3 KB Created: 2021-06-27 17:54:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 5f04c43bdf434bdca311cae178c82952 SHA-1: 2247fbd49c5157eb975d2033a405544991eba0a1 SHA-256: b4241e68e8d1bca33b60049f4b5b521a09b4ec31037b6cbb4ee60320be9d4f97
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and lures users with promises of free game hacks. The document body and extracted URLs strongly suggest a phishing or scam attempt designed to lead users to malicious websites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/how-to-record-roblox-for-free-game-hack In PDF document text
    • http://opac.kolejkrim.edu.my/repository/synapse-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-hack-robux-and-tix-download_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/top-free-commands-in-roblox-without-admin_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/hack-of-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-robux-hack-no-password_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/account-hacking-software-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-face-roblox-youtube_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-hack-tool-online-no-download_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/blonde-hair-roblox-free_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/make-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-unlimited-free-robux-on-roblox-2021-1_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/haktuts-coin-master-today_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-freebies-2021_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_off00003426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3426 22136 bytes
SHA-256: 19c456d687ecbc78c045ba878c7c544092d8372ffc7aeed24acbf1c12442bd4a
font_01_sfnt_off0000652a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x652A 18988 bytes
SHA-256: da2cf2a321b7ac0b40401fe1df78fa9aec2124760f4477929903cb59323ba6c0