Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bf842c945643223…

MALICIOUS

PDF

52.4 KB Created: 2021-06-10 16:40:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c5fbffdc6097baf755d03e3fea025be8 SHA-1: 14e4024e12518727f2869cd1e6f050e5b2eeb741 SHA-256: 7bf842c94564322340341c8c30400a366ffaf64cad86dd92c796d84833251fd3
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. 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 0.9866

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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 https://netcdn.tw/app/431946152/roblox-game-hack-download-game-hack PDF link annotation
    • https://library.itn.ac.id/perpusitn/repository/minecraft-cheats-pc-2021_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-server-hack_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/robux-survey_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/300-robux-for-free_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/is-roblox-free-on-xbox_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-roblox-characters_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/freespinandcoin_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/script-executor-roblox-free_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-promo-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-hack-coin-master-using-es-file_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/robux-no-verification_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-spin-coin-master-twitter_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/pokemon-go-free-stardust_GM1094591345.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/hack-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/hack-roblox-for-robux-2021_GM431946152.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005219.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5219 39272 bytes
SHA-256: 0c0d0d595b30602850d70d0c2d30919a18fc9443abd54835bad2c36425e0b37d
font_01_sfnt_off0000a8aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8AA 18948 bytes
SHA-256: 27eb23edecd4e57681fb54aa6289edf23754c308d566dd94967126363e1d2292

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