Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c138a2569b1e2ab…

MALICIOUS

PDF

33.0 KB Created: 2021-07-07 19:20:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 20cb5c5afde63338493994e328821e2e SHA-1: 129f3549141f6ce20d992533f19456aa4765199c SHA-256: 1c138a2569b1e2abe9721de81dedc8c04daabc5d939d971c2b4740799dcd628e
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/431946152/how-to-get-free-robux-generator-game-hack PDF link annotation
    • http://stomatoloska-ordinacija-rijeka.com/files/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/bighead-tshirt-roblox-free_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/roblox-free-followers_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/coin-master-daily-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/coin-master-hack-without-downloading-apps_GM406889139.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/how-you-get-robux_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/pastebin-robux-promocode-hack_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/coin-master-spin-hack-apk_GM406889139.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/how-much-tiktok-free-account_GM835599320.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_off00002b15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B15 22152 bytes
SHA-256: 968301030921fcf51a6374264de301640254ba8cfde9d1ce233e75be677501ee
font_01_sfnt_off00005c31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C31 18984 bytes
SHA-256: 9ace3a26ef8593b997a2527bb5fc552eafd0119b2772e901bbb9c059dfbe5502

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