Malicious PDF — malware analysis report

Static analysis result for SHA-256 81208edb11e69134…

MALICIOUS

PDF

33.2 KB Created: 2021-07-03 15:34:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 9a3d999f3d9256905e1ed78c9d2a1188 SHA-1: cf3766d873f66c68f6d3714ddcb2689dfff8dacc SHA-256: 81208edb11e69134661163a219edbd774501e6d2fdc6ae6413694213253c2d26
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and generators to entice users. It contains multiple embedded URLs, including a primary malicious redirector at http://netcdn.tw/app/431946152/roblox-fly-hack-game-hack. The document's structure and embedded links suggest it is designed to lead users to potentially malicious websites, likely for credential harvesting or further malware delivery.

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/roblox-fly-hack-game-hack In PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/buy-free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/how-to-get-free-robux-on-roblox-on-a-tablet_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/fd-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/avatar-de-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/free-robux-rewards-site_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/free-robux-live_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/how-to-get-free-robux-without-downloading-anything-2021_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/roblox-games-com-free_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/roblox-death-zone-hacks_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/free-robux-so-sick-free_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/cinnamon-hair-roblox-free_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_off00002df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DF0 21376 bytes
SHA-256: e49722362d1759c91b16f3432a05c6e16b47f65508f976d091482d5dfa0466ad
font_01_sfnt_off00005cc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC1 19000 bytes
SHA-256: 85597ddf86b547b1587e1575dd14eab6ad0408ff1d5dd1947e703cb703eeca41

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