Malicious PDF — malware analysis report

Static analysis result for SHA-256 94f98567409c4ba7…

MALICIOUS

PDF

44.6 KB Created: 2021-06-03 14:56:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 67d28448062e398a6b95279ef7b6d4e0 SHA-1: 3bf67425f5f68ad74bf8469400472a0347258515 SHA-256: 94f98567409c4ba7b1b402b875cd150fcd4f0781a9e35c4cb195cc2953d6aaf6
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 0.9865

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-hack-android-game-hack PDF link annotation
    • http://library.yamasi.ac.id/repository/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/new-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/is-pokemon-go-community-day-free_GM1094591345.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-hack-using-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-much-pubg-uc_GM1330123889.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/minecraft-mojang-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/minecraft-java-edition-free-download-for-android_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-free-spins-2021-app_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/robuxmatchcon_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-pet-food-hack_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/collect-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/static-moonactive-net-free-spins_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-easy_GM431946152.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
stream_004_off000051e4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51E4 25580 bytes
SHA-256: cb2a7e4ca6ede46abdf2198ca4df0e337ad1f9616bbc2755395c0691b7ee2a7e
font_01_sfnt_off00008cb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB9 17888 bytes
SHA-256: a3f3c6358bf6c689f14a31b2bec7c705949e82e1ea95935703b782b8d0a54cd0

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