Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e91e288dbbfcdc4…

MALICIOUS

PDF

33.3 KB Created: 2021-06-17 17:02:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 43a660de20487aa8daf718f2abb73439 SHA-1: d3656dc431c5b11f6b0d4a3f61ebb6666f319cd4 SHA-256: 7e91e288dbbfcdc446f69b8a685d9e4779d830874f611becbd8ad8f961d3092d
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, employing 'free generator / game hack' themes to entice users. It contains a large number of external links, many pointing to other PDF files, suggesting a link farm or redirection scheme. The primary URL http://netcdn.co/app/431946152/pokediger1-free-robux-game-hack is likely a gateway to malicious content or further phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/pokediger1-free-robux-game-hack PDF link annotation
    • http://korporacjaroma.pl/images/get-free-account-roblox_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/roblox-play-now-for-free_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/how-to-get-free-obc-in-roblox_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/hacks-master-coin_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/free-coins--spins-coin-master_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/free-stuff-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/daily-free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/free-robux-today_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/free-100-robux_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/free-robux-clothes_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_off00002cd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CD2 21572 bytes
SHA-256: 2a1a8bb136638861f5c25745dd053a78716c4b77dc2d766d1224c9dd1f4c18cf
font_01_sfnt_off00005c5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C5D 19256 bytes
SHA-256: a8113cf57b1c7c7423eb9811ddd41dfa54aa612440d822add9de2245e5146fcd

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