Malicious PDF — malware analysis report

Static analysis result for SHA-256 d37816de75672bcf…

MALICIOUS

PDF

44.0 KB Created: 2021-05-11 15:12:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 74283d2364e0e1de918be3f7d37e34f9 SHA-1: 666b02176a9edf83c02174bf0b92aea85d4aba5a SHA-256: d37816de75672bcfce793a226ae60237697df89cce8fd39fe73a2a46b45d07cf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The primary malicious URL identified is https://netcdn.xyz/app/406889139/hackear-coin-master-espaol-game-hack. The document's structure and embedded links suggest a social engineering tactic to trick users into visiting potentially harmful websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/hackear-coin-master-espaol-game-hack In PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/how-to-earn-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/roblox-comroblox_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/claimrobux-net_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/free-spin-link_GM406889139.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/minecraft-xbox-one-free_GM479516143.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/androeed-ru-minecraft_GM479516143.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/aimbot-download-roblox_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/how-to-sue-roblox_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/earn-robux-today-earn-robux-today_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/minecraft-for-free-apk_GM479516143.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/watch-videos-for-robux_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/free-robux-app_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
stream_003_off00004740.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4740 25460 bytes
SHA-256: b5e165caff481b55f8eff43d7506f8e9e8437576b812bbec20e5be3e91aa9bc0
font_01_sfnt_off00008033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8033 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008a1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A1E 17968 bytes
SHA-256: e55399e6b1729cd549cc8f12a8b8cdf8c971c0c09938f8d6dc12d7f4d019c528

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