Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f1f808639c9e899…

MALICIOUS

PDF

33.0 KB Created: 2021-07-06 15:18:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 72e397af48ce77fdedebfef3660ce048 SHA-1: 297c4a8b50989b1eafb53004e2ebddfa4082f53f SHA-256: 4f1f808639c9e899f0afa7da5edca2cdd88be4b1dd40725ef0cc02fd70899e9c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to free Robux and game hacks to trick users into clicking malicious links. The document contains multiple embedded URLs, including a primary redirector at http://netcdn.tw/app/431946152/www-roblox-com-free-robux-game-hack, which is known to lead to malicious infrastructure. The ML classifier also flagged this PDF with high confidence, indicating malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/www-roblox-com-free-robux-game-hack In PDF document text
    • https://i-tech.ac.id/perpus/repository/hack-roblox-phantom-force_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/roblox-free-shorts_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/how-to-speed-up-jg-productions-roblox-hack_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/are-sound-ids-on-roblox-free_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/how-to-hack-in-roblox-on-ipad_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/roblox-free-robux-map_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/uninstall-roblox-free_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/como-hackear-robux-en-roblox-facil-y-rapido-en-celular_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/abstract-hack-roblox_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-rixty-roblox-code-2021_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-robux-hack-youtube-pc_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/arcane-adventures-roblox-14-hack_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/robux-generator-hack-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-remy-roblox-id_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-robux-giveaway-twitch_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/roblox-hacked-maps_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/how-to-get-free-robux-on-roblox-group_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/roblox-plates-of-fate-hacks_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-pin-numbers-for-gift-cards-for-roblox_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/indian-gamer-roblox-ninja-legends-hacks_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_off00002a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A5B 22036 bytes
SHA-256: e6a3629089138a59685f9a6a67213be6b08a2766920d5afefe2bf294247603b7
font_01_sfnt_off00005b12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B12 19412 bytes
SHA-256: 9f2d18035413ba33397c677b2581e7e69ab306c490ad5b1efc57e4a607bb5205

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