Malicious PDF — malware analysis report

Static analysis result for SHA-256 634f86de7887e348…

MALICIOUS

PDF

35.0 KB Created: 2021-06-30 23:31:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 21beddf64775592a0f885efc5868a595 SHA-1: e26e867eb4901a77c7a53844842a9d3c730455a5 SHA-256: 634f86de7887e348820d93ea2d3046f0543da1f9ef5327026ac3c999b0076349
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one to a known malicious redirector infrastructure, masquerading as 'Roblox Admin Hack No Download'. The document body and heuristics indicate a lure for game-related cheats, likely to distribute malware or phish for credentials. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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.
  • 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/roblox-admin-hack-no-download-game-hack In PDF document text
    • http://digilibfisip.uwks.ac.id/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/glotis-how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-earn-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-hack-youre-hacked-account-back-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-get-marshmallow-head-in-roblox-2021-fr-free_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-make-time-freeze-in-roblox-free-admin-hangout_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-roblox-plane-models_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-robux-codes-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-robux-no-verification-2021-mobile_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/roblox-free-pants-catalog_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/roblox-hack-apk-android-oyun-club_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/noxplayer-speed-hack-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-hack-accounts-on-roblox-on-ipad_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/did-biggy-get-robux-free_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-roblox-clothes-temp_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/hack-jailbreak-roblox-2021-cranberry_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-can-someone-hack-into-yourroblox-account-from-discord_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-exploit-in-roblox-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30F0 22176 bytes
SHA-256: ec0553c94762e6243574b9ceb44e0dd0d708a3be415ca0c789cbc2952c34d273
font_01_sfnt_off00006230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6230 19540 bytes
SHA-256: fa7d8c7fb9be35ea838b43b8aa146bc02129fe4dfa42fe95436c824b40065208

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