Malicious PDF — malware analysis report

Static analysis result for SHA-256 37d0fe2d6893c912…

MALICIOUS

PDF

31.8 KB Created: 2021-07-06 14:17:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 2c1dd0d0d7b1ef966c20b92330664c16 SHA-1: 2085633795407e94d057924c251d5c161481d0ed SHA-256: 37d0fe2d6893c91251aeed23d33d4cea496a7fa972710507b73a68dec9f30451
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/minecraft-java-code-free-game-hack PDF link annotation
    • http://razredna-nastava.net/files/get-free-robux-gigicom_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/robux-for-kids_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/who-to-hack-pubg-uc_GM1330123889.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/mcpe_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-daily-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-cool-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/tiktok-free-wallpapers_GM835599320.pdfIn PDF document text
    • https://razredna-nastava.net/files/i-need-robux-for-free_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-jailbreak-hack-2021-november_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/minecraft-apk-android-free_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/1x1x1x1-roblox-id_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-play-online-free_GM406889139.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_off0000292f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x292F 22040 bytes
SHA-256: c6ac181af10e21867c013a9b9fca932b9fe39ab14961e7f59979e9b33bb5e5cc
font_01_sfnt_off0000591d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x591D 18452 bytes
SHA-256: 16671fd22d5178f4ee91bd1dac9de86b871bb3f71416cabb6af28097c9991cf7

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