Malicious PDF — malware analysis report

Static analysis result for SHA-256 80cbf5dcbb5c2974…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 17:24:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 2f9e8ece4a7fe07a1d0840626356136d SHA-1: cff2c3b6fc0b42c55f89859d1d7dc60ee7338c58 SHA-256: 80cbf5dcbb5c2974f597f667488fe3d29984d9ee6fb664ccd786b29f23311fd2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, specifically advertising 'free generators' and 'game hacks' for popular games. The primary lure URL is http://netcdn.tw/app/406889139/coin-master-free-spins-blogspot-game-hack, which is associated with malicious redirector infrastructure. The document's content and embedded links strongly suggest a phishing or scam attempt designed to lead users to potentially harmful websites.

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-free-spins-blogspot-game-hack In PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-knives-in-assassin-roblox-2021_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/minecraft-logo-maker-free_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/real-free-robux-games-2021_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/bad-business-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-vip-server-for-roblox-gravity-ship_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-coffre-vesteria-free-weekend_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/get-robux-for-free-and-quickly_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-update-2021_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/cheat-codes-in-endless-treasure-quest-on-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/is-roblox-free-on-pc_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/minecraft-hacks-xbox-one_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/this-server-is-hacked-sound-id-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/como-hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-roblox-account-with-lvl-max-on-boku-no-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/promo-code-free-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_off000030c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C2 23216 bytes
SHA-256: d82086e98f53bc384ad8e9b901f77225444bf560b15070b09bb7865be6e2f53c
font_01_sfnt_off0000653a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x653A 18464 bytes
SHA-256: 05a87c5e5a55dd1cacb71415224dc1225f286447460dff7243b727236e2d7549