Malicious PDF — malware analysis report

Static analysis result for SHA-256 85798b75627a7ae3…

MALICIOUS

PDF

44.7 KB Created: 2021-06-03 14:04:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b7df57c7e8267fcc1a3e9fd80c5bc186 SHA-1: 2803a1e6041a70043c6a8f1727f6abe7b7bdea85 SHA-256: 85798b75627a7ae3e8c24d35551c365f6ea0911eae7f012ee7d5a7b75400130f
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9865

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.online/app/406889139/coin-master-fun-hack-game-hack PDF link annotation
    • http://katalog.stikesmukla.ac.id/repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/minecraft-apk-download-free-11-055_GM479516143.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-free-spins-and-coins-app_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/roblox-getting-hacked_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/100-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-to-make-your-own-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/tiktok-free-hearts_GM835599320.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/moon-active_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/hack-coin-master-nyc_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/lots-of-robux_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-hack-apk-35-11_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/mcpe-master-coin-hack-apk_GM406889139.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_off00005320.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5320 25276 bytes
SHA-256: 746b20d4fd1a22d6ec847b1d55831020cb71002645a31ec8d0190cdf5158dbc4
font_01_sfnt_off00008cff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CFF 18020 bytes
SHA-256: fc50c95c6124226f0e04eb366e05f521741bbfbc224416fc341995a3278920d1

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