Malicious PDF — malware analysis report

Static analysis result for SHA-256 872d3eb44ffb550e…

MALICIOUS

PDF

44.9 KB Created: 2021-06-03 20:36:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: ff452b8436d7fbd64a34e2c73bbc1f22 SHA-1: d90e314fd91556e53aa72d21ca80bf96feec73a9 SHA-256: 872d3eb44ffb550ed9a8db99bf308b8a1b95c9edf0b2ef91ff318301f00ef9df
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The primary lure URL is https://netcdn.online/app/479516143/minecraft-windows-10-hack-client-2021-game-hack. This indicates a social engineering tactic to trick users into downloading potentially unwanted or malicious software. No scripts were extracted, but the presence of malicious redirector links and the lure content strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/479516143/minecraft-windows-10-hack-client-2021-game-hack In PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/coin-master-mod-version-free-download-ios_GM406889139.pdfIn PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/150-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/coin-master-hack-download-apk_GM406889139.pdfIn PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/hack-version-of-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/roblox-inappropriate-games_GM431946152.pdfIn PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/free-roblox-accessories_GM431946152.pdfIn PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/minecraft-anarchy-server-no-hacks_GM479516143.pdfIn PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • http://perpustakaan.smkn1pbg.sch.id/repository/roblox-cheat-enjen_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
stream_004_off00005230.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5230 25236 bytes
SHA-256: be667abaa8a28501daf562d08866d764cea52a662df9fc3720e13c69dc7a47b2
font_01_sfnt_off00008aff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AFF 18892 bytes
SHA-256: 54639ec1e5a0ee3fa3fc1cac5921c09ae703af0deb08d5069a7095b9a5c5a121

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