Malicious PDF — malware analysis report

Static analysis result for SHA-256 f671c0da2e7e287b…

MALICIOUS

PDF

44.9 KB Created: 2021-05-11 23:38:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a43536bd8b2c9440289a3a33b5e0d35a SHA-1: 52eeea31fff6f1272907eccab369ff0427513f03 SHA-256: f671c0da2e7e287b6c647c61bbfc5ad7ea46dc89d5082821ec9454de31bfbfd5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'game hacks' and 'free generators' for popular games. The primary redirector URL is https://netcdn.xyz/app/406889139/coinmasterfreespins-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a lure designed to redirect users to potentially malicious content, likely for financial gain or further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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.xyz/app/406889139/coinmasterfreespins-game-hack In PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/free-coins-coin-master-daily_GM406889139.pdfIn PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/give-me-robux-now_GM431946152.pdfIn PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/roblox-free-hair-codes_GM431946152.pdfIn PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/heroes-online-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-apple_GM406889139.pdfIn PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/is-minecraft-earth-free_GM479516143.pdfIn PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.man4pandeglang.sch.id/__statics/gudangsoal/files/daily-free-spins-coin-master-app_GM406889139.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b9b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B9B 24600 bytes
SHA-256: ec6e4aa76bcfeaa8190091dd0546120a2f89d5576dae8e98e58ba8e3af1c3479
font_01_sfnt_off00008407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8407 2868 bytes
SHA-256: d2d857e2ddc1082c7667b23f2135a5c0ba26a2ff8b42c86c89c8e0b09aece855
font_02_sfnt_off00008df2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DF2 17980 bytes
SHA-256: 48872130680f0d6309128a4b322cbb0730700ec4544966fd5aa3d357de7636d5

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