Malicious PDF — malware analysis report

Static analysis result for SHA-256 febb58d7f3e4603f…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 04:09:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 73c0065a29d5f1885cd20dc9cc8faa68 SHA-1: 48de2ebc983135e3d0ab580d25d697af33732756 SHA-256: febb58d7f3e4603f53f454ffd409ec64418f9382382d1004f21978cf1693b20c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'generators'. The primary URL identified, http://netcdn.tw/app/479516143/how-to-make-a-server-in-minecraft-java-for-free-game-hack, is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a lure designed to trick users into visiting potentially harmful sites, likely for further malware delivery or phishing. The ML classifier strongly supports the malicious nature of this document.

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/479516143/how-to-make-a-server-in-minecraft-java-for-free-game-hack In PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/fishing-simulator-roblox-hack-vehicle-mods_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana//repository/robux-come_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/free-coin-spin_GM406889139.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/free-roblox-account-premium-generator_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana//repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/roblox-jailbreak-hack-client-download-trackid-sp006-trackid-sp006_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/what-is-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/avatar-animations-roblox-free_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana//repository/free-coin-master-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/how-do-you-hack-for-2021000-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana//repository/coin-master-hack-no-survey_GM406889139.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/roblox-download-free-windows-xp_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/bloxburg-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana//repository/coin-master-free-spins-ios-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/how-do-you-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/how-to-get-free-coins-in-assassin-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_off0000324d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x324D 22372 bytes
SHA-256: 8942783df8200ce34ee8a49e2029f705a98fb8b6b3fcc6c9a327c4af6c6e891d
font_01_sfnt_off0000636d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x636D 18612 bytes
SHA-256: 3ef8c248c1d338f03dbb4a253d87476a2b0dcecbbb215911ffb3ac77507b90e6

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