Malicious PDF — malware analysis report

Static analysis result for SHA-256 4507b083b4b76369…

MALICIOUS

PDF

34.9 KB Created: 2021-06-29 17:39:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: c971a2aa20efb8d61c4518d0e8661ef0 SHA-1: a633c371821d57bc007271cab33d52b7359d353d SHA-256: 4507b083b4b7636943cba0f3d7e1f9f08dedfcf59f8af01729d9f0db5ec91c71
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector, disguised as a lure for game hacks and generators. The document body and heuristics indicate a social engineering tactic to trick users into visiting potentially harmful websites. No scripts were extracted from this sample, but the presence of malicious links and the lure suggest a phishing or malware distribution attempt.

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/free-try-of-new-modle-roblox-game-hack In PDF document text
    • http://lib.untad.ac.id/repository/follow4follow-free-followers-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-hack-download-ios_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/using-cheat-engine-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/hack-heroes-online-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-limiteds-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-coin-master-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-free-download-no-sign-up_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/guess-that-song-roblox-cheat-sheet_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/download-hacked-games-com-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/microsoft-bing-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-spawn-things-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-download-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/trybox-site-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/glitches-for-free-girl-hair-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-things-in-roblox-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_off000032df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32DF 21632 bytes
SHA-256: 9248af9aa482dbb5abe517a10ad94c6357ceaff48fad202dbad25154c22f4e38
font_01_sfnt_off0000627a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x627A 19364 bytes
SHA-256: e659b871f1c5f44de20923528405b1ff57e47dca6f218bdbe055a83569ec6e1e

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