Malicious PDF — malware analysis report

Static analysis result for SHA-256 834f5802199f3601…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 01:13:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: c97722bb1380ce587649b8b82d3f8b89 SHA-1: 82126fa459166fe9601febb9c887eddbc51313ad SHA-256: 834f5802199f360143eacb71bcab34c248f3bb88abb1c46dd68d74239866a0d4
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 0.9980

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/406889139/claim-free-spins-coin-master-game-hack PDF link annotation
    • https://fib.ub.ac.id/sac/repository/free-girl-hair-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/are-free-robux-streams-legit_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/rewardex-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/transparent-roblox-shirt-template-free-shipping_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-download-free-chrome_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/robux-sites_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/get-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/cheat-engine-63-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/toolbox-for-minecraft_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/earn-robux-now_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-money-hack-roblox-vehicle-simulator_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/getbucks-free-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-admin-roblox-game_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-hack-coin-master-game_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-diamonds-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coinmaster-blogspot_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_off00003055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3055 23180 bytes
SHA-256: 3f21711e50bea712669a402323e1dda40b123f4b5d96653a64ce6a7d54e6bdbb
font_01_sfnt_off000063fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63FE 18508 bytes
SHA-256: 66edbbd631945b07c06d9fd06a14c74e41c138e401aa3f28fe2d50c5e2faa941

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