Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e5251d88095594a…

MALICIOUS

PDF

47.7 KB Created: 2021-06-09 09:09:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d0c74013edfe5341f89723dac05d2e59 SHA-1: 34b3ce52e1dbcea23dde77560fd5c274e14f940e SHA-256: 7e5251d88095594a7cb89ffcb9c6822586ff9f6ab7d19b0bd224e035b8ef5d82
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it links to malicious redirectors, specifically advertising game hacks and generators. The primary URL identified, https://netcdn.tw/app/431946152/roblox-hack-kick-gui-2021-game-hack, is repeatedly referenced and appears to be the main lure. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest a phishing or redirection attempt to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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 https://netcdn.tw/app/431946152/roblox-hack-kick-gui-2021-game-hack In PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-online-hack_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-hack-ios-10_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-robux-glitch_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/roblox-how-to-get-free-admin-on-any-game_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/how-to-get-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/how-to-sue-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-time-hack_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/roblox-how-to-get-free-stuff-from-catolog_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/what-is-exploiting-in-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53DD 24504 bytes
SHA-256: 1bfb8159035d1546850f3560e21a85cbfb4d4d6e7487f59baed4dbac283432eb
font_01_sfnt_off00008b9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B9F 3000 bytes
SHA-256: 415b8ca07467cc6b1d74ddc9a38943fb6d263a241d6e4db9f38ff3acab56a07a
font_02_sfnt_off000095ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95EE 18844 bytes
SHA-256: d7add4037fa3bbf96003e08bd5c68617782534eadd7b6f778913d8fb387f3a0e

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