Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2527934766c1a31…

MALICIOUS

PDF

35.1 KB Created: 2021-07-06 19:03:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 8ac3ec942ee2e29aa6155e1ac5c294e4 SHA-1: 88d8fc311a5faeb39a17e966623954395a4268b6 SHA-256: b2527934766c1a313084822ba3ca1924ce2b82c2ab6e38414cb992c577d35ef7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector, that promise free Robux or game hacks. The document body and heuristics indicate a lure designed to trick users into visiting these sites, likely leading to further malware downloads or scams. No scripts were extracted, but the embedded URLs and redirector findings strongly suggest a phishing or scamming 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.tw/app/431946152/robux-hack-free-robux-game-hack In PDF document text
    • http://elearning.man1kuburaya.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-account-2021-february-2_GM431946152.pdfIn PDF document text
    • http://elearning.man1kuburaya.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://elearning.man1kuburaya.sch.id/__statics/gudangsoal/files/how-to-exploit-yoru-on-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://elearning.man1kuburaya.sch.id/__statics/gudangsoal/files/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • http://elearning.man1kuburaya.sch.id/__statics/gudangsoal/files/free-robux-fast-ponits_GM431946152.pdfIn PDF document text
    • http://elearning.man1kuburaya.sch.id/__statics/gudangsoal/files/free-unbanned-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://elearning.man1kuburaya.sch.id/__statics/gudangsoal/files/roblox-best-free-models_GM431946152.pdfIn PDF document text
    • http://elearning.man1kuburaya.sch.id/__statics/gudangsoal/files/roblox-pilliow-simiulator-free-pillows_GM431946152.pdfIn PDF document text
    • http://elearning.man1kuburaya.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-playing-a-game_GM431946152.pdfIn PDF document text
    • http://elearning.man1kuburaya.sch.id/__statics/gudangsoal/files/free-tiktok-likes-and-followers_GM835599320.pdfIn PDF document text
    • http://elearning.man1kuburaya.sch.id/__statics/gudangsoal/files/free-roblox-executor-2021_GM431946152.pdfIn PDF document text
    • http://elearning.man1kuburaya.sch.id/__statics/gudangsoal/files/hack-downlad-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.man1kuburaya.sch.id/__statics/gudangsoal/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://elearning.man1kuburaya.sch.id/__statics/gudangsoal/files/twisted-murderer-roblox-level-hack-with-nopde-engin_GM431946152.pdfIn PDF document text
    • http://elearning.man1kuburaya.sch.id/__statics/gudangsoal/files/cheat-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.man1kuburaya.sch.id/__statics/gudangsoal/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://elearning.man1kuburaya.sch.id/__statics/gudangsoal/files/roblox-cheats-for-robux-2021_GM431946152.pdfIn PDF document text
    • http://elearning.man1kuburaya.sch.id/__statics/gudangsoal/files/delete-free-roblox-account_GM431946152.pdfIn PDF document text
    • http://elearning.man1kuburaya.sch.id/__statics/gudangsoal/files/cheats-fr-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.man1kuburaya.sch.id/__statics/gudangsoal/files/roblox-ooga-booga-chest-spawn-cheat_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_off000032d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32D3 22500 bytes
SHA-256: b39389ed93feee5c1ca22e29c73e359faeac3b80e29a049c80fe695df404df15
font_01_sfnt_off000064e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E7 18884 bytes
SHA-256: 28c83382703d1552e66c4ba49065192da850ec7c15b1cba66d0a11ad7ce6efaa

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